Light - Reflection & Refraction - Class 10th Science 🔥| One Shot | Prashant Kirad

0:04 science science science i don't like i avoid But when Prashant bhaiya teaches science then So it's fun and another session like this I have brought some light for you today Light is light, it refracts inside the light I had a lot of questions coming from you, you said Bhaiya it was the reflection bending I don't understand the light, I am telling you I will explain it to you, chill out and then your mind will brother I was wondering that lens This is a formula, there is no numerical solution Could it be that those screen questions are not there You just chill and I will get it done I have brought the complete lecture, first of all a Tell me in bar chat how is the enthusiasm and energy How is the josh meter, is it high if it is high

0:52 If yes, I will tell you quickly in chat Energy quickly josh meter tell me add add add what you are writing oh ho ho This is another channel, ads are not stopped in this You must have done the ad, stop the team kids There should be no problem, add it and turn it off immediately Stop it immediately, I would have stopped it myself I am from here, the josh meter should go once quickly I will tell you everything from Soon the enthusiasm meter will tell Let's all go very good very good very great already students come join us How many students are there? 30000 Students have joined us with enthusiasm The meter energy level should be very high and This boat boat boat thing has been going on for a long time Isn't it true that yesterday the boat crossed all limits

1:38 Made history in no boat itself, means one Normal history happens in the boat itself Made history in our class yesterday live watching 75 lakhs I said brother 75 lakhs this is It is too much, not so much a child is writing but vs got then this because we thought that classes should not be taken on that channel because It has a lot of recorded content No, there is a lot in what you have to read It's all rapid revision, lots of lectures There are a lot of trick videos, right? So I did not want to make that channel a mistake anything could happen by mistake yes but we could not stop studying because You had your exams so I told you to go away to hell with it, we'll teach you one here

2:26 There are not a few channels, there are many channels, son many channels One will get it closed down, the other will do the same will make us do it on the third, we will not be afraid of losing You won't agree, right? Show me this butt too. we'll show you what it is okay I will not show it, I will not show it, yes Very good very good brother of gad series PDF fools please look at its description Go and check it out there in PDF format. whether it is there or not, without it being written yes, we will beat the boat and drive it away We will beat him up and chase him away, yes, not here The boat will come today, it should not come, I hope we should not come fully hopeful let's go Very good this is a new channel I mean if there is another channel then there are kids in it

3:12 They might not know about this channel. You can share it with your friends at once do it so that they know They don't know that Prashant Bhai today Are you taking someone's class here? If you don't want to miss class then I hope you will miss your Tell your friends that yes there is another channel is getting class on top of that okay and this you know it's channel 11 and I'll give you a I will tell you a very good thing, a secret Should I reveal it or leave it alone leave it leave it leave it leave it leave it leave it, leave it, I am saying do it my friend Please brother, do it, look brother, the matter is like this The thing is such that this chapter, this This is a channel, you have a lot of work ahead of you It is going to come, how will it be useful brother, if something happens

3:59 gonna something is going to happen isn't it, when you you will go from 10th to 11th when you go from 10th to 11th In will you go So something will happen, I don't know what will happen I don't know if something will happen then it will happen right a lot will happen a lot will happen A lot will happen, you will come and you will hope you will meet me again Fully, it has happened many times on this channel, yes I understood, I understood, I understood, very good, very very good very good Good, let's have his surprise, he is in peace I will tell you later, right now it is 10th You were with me even when I completed my 11th class, my friend chill out you chill out you chill out it's ok so

4:47 I'll go and see, I'll see I will see come let's start let's Start our chapter let's light the light Many children will start happy Rose Day is today Rose Day, what is Rose Day Happy Rose Day to all lovers and those who The poor are alone in their lives everyday As the day goes by, as each day goes by Your son will pass the same way today Nothing has come for me, right lovers Happy roast for let's get started Let's start the lights first Look, we will start with the basic concepts. I will finish the whole thing in under two hours Numerical focus will also remain high You should keep reading quickly, just focus keep applying it, I will take care of the rest, you just chill you are chilling right, no, its not here but

5:33 It's good brother, the butt is not coming here, see look this is what happens brother but but b but hat yes look at the light and it seems to me something People attacked the same channel after asking for his life I got it done that butt comes on the same channel, do you understand are you understanding right? Yes then look at the light need you tell me what is light no all you need to know is that the light The speed which is inside the air i.e. vacuum How much is inside? It is 3 * 10 Rate power 8 meter per second This value will give you You should remember its main points quickly let's move on to the concept, which is Reflection of Light from Reflection of Light Your chapter begins with reflection what happens son reflection of light is basically what should i say bending not bending sorry what bouncing back of light that is a a process whereby a light comes and

6:20 the light bounces back bounces back when it hits a surface What do we call the process that collides yes son we are talking about that process tell me what is that process called what would have been happening yes very good very It's great what these kids are writing Boat vs Jat what are you writing brother dude you're okay yeah bouncing wag of light Now it has some lodges, those are also lodges There are many big and small rules which you follow very carefully. You have been reading this from before, what is a lodge the law of reflection of reflection Let me tell you what the first law is Look at this diagram, it is not asked like that Still let me tell you that the incident reflected ray and one that is perpendicular this is what we call normal, these three are one Let's lie on the plane, that is, incident reflected ray and what is normal for it

7:07 what would all three of them be doing on a plane, son yes we are lying, it's very simple Everybody already knows this, right? The next law is very simple, understand the second law. He says that this angle which is being formed We call this the difference between incident ray and normal ray. they call it the angle of incidence and Angle between the reflected ray and the normal It is being made, we call it angle of tell me what is the angle of reflection The incidence and angle of reflection are always are equal then these are the two rules which We call it the Law of Reflection, the first law. What is Incident Ray and Reflected Ray? Normal all la at the same plane on one plane will be on a plane will be on a plane no and what is the second angle of incidence What is equal to angle of reflection?

7:54 I understood what I understood a lot It's great, very good, don't you understand? I have come okay okay I have come I have come it's clear it's clear it's clear let's go right very right one minute one minute one minute two yes ji let's go yes ji very good now let's move on Now let's move ahead, now these two laws I've told you, now we'll talk Characteristics of image form by the plane Look in the mirror son what is a plane mirror The glass of your home in which you keep your beautiful you gaze at the face in which you see how do i look today how am i looking today I am looking smart today, right? yes, what is that, that is your plane Characteristics of a plane mirror what happens what is asked in the paper can absolutely be asked and in this I don't even remember you in my daily life, my friend

8:41 You have seen a plane mirror 100-10000 times, right? Do you see brother, a pimple has appeared here Bhaiya, I have got a pimple here. So what are the characteristics of a plane mirror? The first image that is there is virtual Look brother, there is only one, there is only one real one is virtual real image i.e. real virtual That is, the one which forms an image in a plane mirror is fake How is she always becoming virtual That means it is becoming fake, well understand one thing Take a look at this son, remember the real one There is a brother whom we call inverted What does inverted inverted mean Whenever a real image is formed upside down son whenever inside every case whenever what A real image is created, then it is created of the real How the image is formed together, vomiting is formed That means it is formed inverted, understand the real

9:28 Also the image is formed inverted and another Understanding the concept whenever your image is Virtual i.e. fake image will always be created tell me how will it become erect erect erect What does erect mean? Straight erect what does it mean straight now you tell me How does an image appear in a plane mirror? Plane Tell me how does a plane look inside a mirror how to look inside the mirror Is Tell me tell me yes a child is writing this brother If son, you see vomiting when you are at night you see your face in the mirror and if You are seeing your face upside down then, son Son, you should go to some Tantrik you get yourself treated ok so how

10:15 It looks virtual and gets erect right? Obviously it is very simple, okay ok yes it is absolutely great Is your first property always plain? What is it like in the mirror, it is virtual How does an erection happen with a virtual Now there is another concept which we call it is called laterally inverted or we call it We call it lateral inversion son what is happening use your mind use your mind what is lateral eversion think think What is lateral eversion when we look in the mirror This is how you shake your right hand in the mirror You are waving your hand, I have seen you, I have seen you Have you seen it once? Go and raise your hand in the mirror. The right or left hand will be above the mirror i.e. right is left left is right and what do we call that phenomenon

11:02 There is a phenomenon called lateral inversion in which what happens to the image that is right the left key becomes right key You should always look inside a plane mirror the image is laterally inverted How does vomiting happen? Yes, right. ka left left right ok you I have seen the ambulance in the ambulance I have seen that ambulances are always written upside down Have you seen it written upside down, why is it ambulance? I write because when you assume that I am a car I'm driving I'm driving And I'll look back in the mirror like this which car is it then the mirror in my mirror The image I see will be straightened out because lateral inversion will occur and I will read the ambulance. Ambulance I will be able to study and I will drive my car I will put it to the side I will say

11:49 Let the ambulance go first, it's important isn't it yes yes very good very good Very good brother, don't even talk to girls Tell me I am not racist but to girls Do you know how to drive, please tell me correctly There's a very good story about this It is a very good story, we were going once When my mother and I were going there was a car In front of us, he gave a left indicator indicator and he turned right and the car turned right When I turned around I told my mother to look Make sure some girl takes it inside Mom must have scolded me for that why he is saying that why is he saying it like that f hum We took the car a little ahead of that car parallel to me and I looked left and I said Look and the girl right in ok i am just joking come on let's go

12:35 na see next what is next a size of the The image is the size of the object it is exactly equal what happens exactly It is equal and the same size as yours What's Next Inside a Plane Mirror is Very The more important is the distance of the object Say the mirror the mirror is here and I I am so far away that the image that will be formed will not even be an image It will be made at the same distance It will be formed at a distance i.e. object and mirror Distance between the image and the mirror the difference between them is equal to this something properties which is what which is what yes it is very good very good i hope You must have understood these are some properties thi let's move forward now this question was asked to state the law of reflection and dr the well labeled diagram this diagram you had to make and you had to tell two lodges It's very simple, incident ray, reflected ray

13:22 Normal lie on the same plane and what else is the angle of incidence and angle of reflection is equal to let's move ahead now Let's talk about our curved mirror Look, you have two types of mirrors and those If you don't know the thing yet, Let me tell you son what happens Look at the concave mirror how to remember it you have to do it, cave is coming in concave cave what does the cave look like cave hey cave When we go inside, the cave looks something like this It looks like this, isn't it? The cave and the man Look, this is Chintu Lal, go inside the cave If it is there then the cave will look like this, so remember What will be the concave mirror? The cave i.e. this type while the convex The convex son looks something like this it looks like this it looks like this ok Its reflecting surface is this and Its reflecting surface is the inside

14:09 okay son dun dun dun tell me tell me quickly What did you understand quickly? What did you understand? I came speak speak speak speak speak speak yes very good very good let's go here now But there are some important things that you You should understand what is important things like this diagram First of all we will see what is a diagram we are talking about very basic things that your There is a mirror, it has a point which We represent it by p and we call it polls say polls say ok polls What is a pole? A pole is a point of the mirror so that your line is not a line We call this the principal axis the principal axis through which the passage would be that point is called pole we say poll ok son done next next look there is a point here which

14:56 We represent C as the We call it the center of curvature, the center of What is the relationship between curvature and pole and center of curvature? is the mid point which is the mid point what do we call that mid point that mid We call point what do we call focus Is it the son's focus or the principal's focus too? It is also called principal focus okay son its going very well I hope you are able to understand till here It is clear, tell me quickly this which is reflecting You are able to see the surface which you are using as a mirror are you seeing this reflecting surface We speak of Apert shows their definitions one by one yes, sometimes it is asked in the paper pole centre point of reflecting surface which This is your mirror, the point of it we will see Polls are telling what is the center of curvature

15:41 center of the spare of the mirror which is the mirror not the whole center, the mirror, which The center of it which is coming means a mirror We are using that mirror so much It was a complete sphere and its center point was what is it called center of curvature is it okay Son, I understood this, see next radius what is the radius of curvature The curvature is visible from here to here I will tell you the distance up to Radius of curvature Excellent what next Next is your principal axis which It's a straight line, I've already given the address, next is The principal focus is stated as the midpoint and Focal Length What is Focal Length from Pole The focal length is called the distance of focus What focal length and last comes up appart The diameter of the reflecting surface which

16:28 Our mirror has a reflecting surface what do we call it what do we call it Is the upper limit completely clear? Do we need the definition? Completely cleared quickly tell me quickly Tell me brother stop chatting, I have to study brother Look at Chat Bat, some people keep doing nonsense things Those who want to read it, they can read it yes I am telling the truth to those who want to read it They read a lot, how do they read a lot It is a simple thing in your mobile phone we will close the chat option and take that will sit and study in that tape today 11th kids of class 11th have also come because This is a channel, kids are writing a lot, brother seeing you after a long time

17:14 here love you all love you all love you all love you l love you l love you l come on come on come on Ask them, 11th class students will tell you this what happened to you last year in science His entire paper was mentioned in the paper I said okay, I will do this this year too, son. We will do it for a year, I won't take tension, I am here Come on now let's see how to make a diagram I know kids have a lot of problems To make a hexadecimal diagram I use some I am telling you the rules, you will understand those rules no if you understood those rules One question of diagram will not be wrong and From here the question definitely comes in the paper ok from ray diagram indirectly or I will show you directly, you will ask questions Now understand, first of all understand the rules, there are four rules What is inside the ray diagram of a mirror The rule is to see, son, what is the first rule, son What is the first rule, whenever any of your

18:00 If the light comes in parallel then it will always will pass through the focus even if it is a concave mirror Whether it is a convex mirror or a concave case I can see any light like this If parallel comes then how will she always pass will pass through the focus and if we take the convex If we talk then a light came, a light came that The light will reflect but look at it If we trace it, it will be close to the focus You must be making this rule valid for both of them now see the next rule what is the next rule The next rule is that whenever your light is No Roshni, whenever you are near her, where can she be near you? whenever yours is from the center of curvature If she passes then she has to go back from there too You will have to remember the center of curvature like this he is a goon he says that ok you

18:47 If you go from me then you will come back from me If he goes, he will come from me only, I can't do that that you are leaving me and coming from somewhere else is leaving me and coming from somewhere else it is not happening no no then we will have to do it like this or it will go from the center of curvature and back Very simple very will come from the center of curvature It is very simple and easy, it is the same as yours In whose case in your convex case It's okay, son, let's go back from here Look next, I understood these two cases. Next Look at the case, the next case is if our light If it is getting closer to the focus then it is always parallel The opposite of the first case will happen in the first case What was parallel focus, what is the focus in this Parallel Akshay Kumar is fine, yes, yes

19:34 yes yes yes yes yes ok yes boat we have defeated this boat The boat is not afraid, sail it and see what happens whenever What is our focus, if it passes then what will happen what will happen to the light ray, son she will become parallel what will she become How will it become automatic, if it is parallel It will be okay, done, it will happen parallelly whenever Your focus may be closer to lighter paralysis The last case is when it hits a light pole Whenever it hits the light pole then The angle she will make here is the same as when When it gets reflected then it will form this angle And both these angles will be equal, these four rules Everyone understood these four rules, son Everyone should remember the rules and understand them quickly Tell me, the Gaur series has come brother

20:22 The question is important one is the Yes God series please ask this question, it is not very important If you do, you will regret leaving me The bigger you go the you will regret it, you will regret it a lot, okay come now Brother, first I will show you the main diagram I will make a diagram and show you, then There is also a pass trick, OP trick, OP trick I will tell you the OP trick also. go friend see brother the first thing is a candle ji should be called and candle ji should be given the most First I am taking the concave mirror and I'm putting him on infa infino is from you son is ok

21:08 Infinity is that far away from you Where will the images be made and where will the images be found in the infinities it will be made on focus where will it be made it will be made on focus How will Real become Real's elder brother? who will become inverted and one more thing son that The image will be of point size, just look at it The point size image looks small, right? It will be ok, everyone should make this diagram. Come on let's move ahead now I said Candle, come a little closer to me Come a little closer to me now, candle! Infino has moved on, where is she now?

21:54 It's behind the center of curvature, so here it is my candle now look son what am I now I will draw a ray diagram to create the image You need to throw two light rays to create it The first light ray always throws you you have to put it parallel, okay, whatever light It will always go parallel and pass with focus We all know what to do next now Second, you pass the center of curvature what to do with the center of curvature because which The light will go back from the center of curvature where will it come from Same second rate I did from center of curvature I got it passed, where will it come back from here The image will be created, see here how the image is being created it is becoming real it is becoming inverted Where is it being built between C&F and

22:40 How is the small size becoming smaller? The son is becoming very small, very small I am much smaller than Nanni Munni yes very good brother let's move on now I said, candle, a little closer Come here my friend why are you so far away from me sing a little more river so candle ji and river e And what have we done to bring Candle ji to the centre now? We brought it to a standstill on the off-curvature He said, brother come and stand at the center of curvature Now just be at the center of curvature This case that has arisen is very important, son and inside your mind inside your brain inside which may be a little less in you It doesn't matter, but I will remember you, son Whenever the center of curvature of an object is The image will always be at the center of curvature will it be made and will it be of the same size how will it be made Son, let's understand the same size first, the light ray

23:25 what did you say always put it parallel always Put it parallel and another light and what is the harm in it do it, pass it with focus, pass it with focus If you focus, your image will be formed here But that means the real will be formed in the center of curvature It will be made inverted, it will be made on the same size This ray diagram will be made on the same size son you should see the beans inside the paper The question will come in the paper, guaranteed Very good, I understood this, moving forward yes I said friend candle ji now you Come a little closer my friend, there is a candle Ji said okay now that is the center of curvature and stands in the center of focus Candle, what should I do now? What did you tell me? You need two light rays first. So what you always have to do is to go from focus to pass kara means you have to put it parallel put it parallel Everyone knows that she will pass with focus okay now inside the second light rage case

24:11 what will you do you will put it straight and It will pass through the center of curvature i.e. Look, you will cast this light ray like this and this See what happens from the center of curvature It will pass ok now where will these two come from These two light rays are coming from beyond Center of curve i.e. center of curvature How is the image being created behind becoming large How are you making it, son, the large bun is coming It is becoming real, it is becoming inverted did you understand this did you understand this I came, yes or no, say yes or no, say for you are you getting into my mind or are you just like this This is how the brain is being seen There's a wonderful son inside me no ok did you understand this case Now it is a matter of concern that another case comes up now yes moving forward moving forward where did you go and came into focus i said

24:57 Oho if you have come into focus then you will come into focus This case is also important, why this case Son is important because seeing this case carefully first light ray then always you have to put it parallel and close to focus It has to be done so there is no repetition in it this happens in all cases ok now its what will you do inside same thing second light what to do with ray, throw it in this direction that What can he do to pass the center of curvature throw it in this direction and center off it passes through the curvature i.e. in this direction I sent it to him and what happened was that pass through the center of curvature now see Can you see both the light races it is parallel it is parallel can you see what is visible it is visible or not visible okay now whenever Do you know that two light races are parallel where can they be found where can they be found is able to get

25:56 infinio the most most important The case which is between focus and pole i.e. Accept that your image is yours Yes, the candle has come in the middle, where is it? Moving between focus and pole, here This focus has come, this pole has come in the middle of it This case has come to a standstill, what should we do now? it's totally different it's totally different ok In this, you should know how to make ray diagrams You can see how it will happen in this, the case is totally different Now in this you can not do that by lighting the light If you want to put it parallel then pass it with focus, it is not like this It is totally different, what would you do inside it? light re then you will put it like this on the pole and that it will come from the pole like this ok did you understand and the other Light Ray, what will you do, will you send me here and that

26:43 It will pass through the center of curvature, now see this Will the two light rays never meet? Will I get it? Tell me quickly, yes or no yes or no can I ever get this? I can get it or I can't get it now brother Look, this is the same case as your life. inside you know you know that you too What happens if you can't meet them then? Neither in life nor in the virtual world So this is the real world, son. The real world. We know now that we won't be able to meet We will go to the virtual world and speak Come on friend, if not in real, then at least in virtual If we get it then in the same way what is the light ray Now she will meet in the virtual world Now I won't meet you in real life like this I will trace it and I will see We will meet in the virtual world and create an image

27:29 how large will it be made, how will it become virtual It will become erect and a very large image How will it be made? A very big image will be made. Quick Tell Understand this clearly quickly, this is very This is an important case, this is a very important case Whenever the image is between the focus and the pole She always becomes virtual and erect It becomes large, okay son, now this is brother Whose concave's case are we now Let's talk about Convex Let's talk about Convex There are only two cases, after that I will tell you the trick also Son, tell me a trick too, it's a trick, trick, trick Trick trick is chill na watch it

28:15 Convex is very simple near convex There are only two cases, what is the first case when When your object i.e. the candle Infineon G I will bring infinities, they will collide and go back I will go and where will I meet them, they will meet me How will the image in focus become virtually erect And a very small image will become a point The size is ok what kind of mirror is this Tell me convex and what is your case that if the object is somewhere other than infinity but it will also happen suppose the object is here then what will you do i will send a lighter parallel So where will it get reflected like this The focus angle will be reflected fine and the second light ray if I take the center of

29:02 If I throw it in the direction of curvature then it will come back If you see where these two will go These two will meet, we will meet here Where is the image formed inside it made? This pole is formed between the pole and focus It won't become real, it becomes virtual, see The straight image is erect, virtual erect virtual erect virtual erect tell me quickly Understand virtual erect and become a straight image It is becoming virtual, it is becoming erect It is there isn't it and it is being made in small size i.e. can i say that understanding convex My son is going to tell you a very important point I will show you the numericals as well, I can say I know that a convex mirror always shows the image will make it smaller, yes or no, yes or no

29:50 or no convex mirror will lovage form small Image yes and no yes and no absolutely yes Convex Mirror Can Never Fume Big Image Large can't always zoom out a small image can't do image fm nor recorded ones what should I do with you recorded one, this is what I What should I do with the recorded writing what do i do with it I Tell me what should I do with this recorded one Bhaiya, show me your body, I don't have any body Friend, what should I show? Should I show my body? Even if it should be I want it and I'm lying Come on friend, come on, okay, so this is done. what cases come forward come forward look now

30:38 Now let me tell you the trick, now that we have learned this much I have worked hard, now let's do it brother, it's a trick Brother, listen to the trick of concave mirror Listen to the trick now brother you just see Counting has to be done, everyone knows counting If there will be counting then everybody will know it If everyone doesn't know how to count, then they know how to count If yes, then tell me she should come to the centre first Make it off curvature, right? Now you just see You have to do counting, you don't have to do anything else Normal counting has to be done, see one by one Let's go and see what's inside it first thing you need to do is number put it on infinity put number one okay then Put number two center of curvature here put number three put a number in the middle Put number four here, number five here put number six you can count here

31:24 one two the center of curvature four here five six here okay this is the counting now do this counting from here do this counting from here put number one here put number here put number two here put number three here number four put number here five and joe number six is ​​different which is here Okay, now what is this technique? What is this technique son can anyone tell me What is this technique? Tell me this technique. What is it, what did you learn from this, now see this There is a technique if the object is number one That means if it is at infinity then where will the image be formed See where is this number one, focus on the image The focus will be made on if the object is on the toe i.e.

32:09 If the image is beyond center of curvature then where is the image it will be made here i.e. between f and c wow bhaiya now that it is on three, the image is also An image of the same size will be created on three if the object is right here between these two So where will the image be created? The image will be created here. That means beyond the sea if the object is in focus So where will the image be created? The image will be created here. i.e. at infinity and the last case which occurs It is different from all others where the image is created In the direction This technique came, what did it do? I told you brother, for so long we have been like this you were already going to do this you you you yyy You should have told me this earlier brother friend

32:56 I would have gotten to work right now, brother. what are you doing Come on brother, you have come, you have come to school those who are scared you are scaring me why are you scaring me it has come no this is enough for you to remember them all now you see, with these methods only you can You can answer the chat directly and quickly tell me the answer in chat will tell you soon Brother why are you live on this channel after the kids I will come and tell them on this channel Taking it live because there are butts on it many are coming daily and you

33:41 You can see there is no butt on this channel has come I feel as if someone's This is how that channel is being targeted so that that channel doesn't get shut down it could mean Isn't that channel closed and if it is during the exam If it happens on time then it will become a big issue So that's why I want this for all of you today And tomorrow's marathon will be on this channel so that there is no problem on that channel and You are also from there because many children are from there I read daily rapid revision etc. let's see, come let's see the question here the image show the path what to tell you where the image is going to be created then see if The center of curvature is beyond You just remember where the object will become the image You must have thought that the image will be created Where is F in between? Between C & F I am there where it will be made in C&A and this You can also check it by drawing a draw, son.

34:27 There is no need to worry if you accept this made it and from where it will be passed is yours From where will it pass? It will pass with focus. no and you made this how will it turn out If it becomes parallel then what is in between it Your image will be made clear, is it so? C is the correct answer very good further Let's go to the next question on your screen. son here is draw this diagram in hindi The following cases already draw well Passing through the center of curvature of a Concave mirror means, suppose you agree, what do you say is a concave mirror is a concave mirror and what is happening is a ray diagram to you We have to make such that whenever the light ray is off center what will happen whenever it passes through the curvature Beta light ray is close to center of curvature If she does it, she will also return from the center of curvature

35:14 What did I say that you will go to the center of curvature is the goon he says bhaiya If you come from me, you will go from me only Awesome Next Object is Place between infinity and the pole of the convex mirror now look convex it is not concave son it is convex convex this is how it looks to you son What happens if we move an object to infinity And what if it is placed in the middle of the pole? son i told you to see a light like this Put it back in parallel like this and this Show it like this with pole focus, isn't it the other one? what can you do with the light you have many options, you can either You can also say that it will hit from here It will go back and the image you will create will be here Yes, but it will be made, so the image will be made between

35:59 Focus and yes I came I understood I didn't who is writing this, did you not understand There is a problem sir give me the suit out suit out what is suit out what is out It happens son, it is a suit out, shoot out Salman I am a little angry ok yes object is place between focus and kill me When will you get beaten up and admit it, right? Someday these things will beat me up so yes object is place between focus and pole i.e. if the focus and pole of a concave mirror are if the object is placed in the middle of If it is done then I have told you how the image will be This is a very important case, how will the image be created A virtual and erect image is formed behind

36:46 It can be done, right? Yes, everyone will remember it, let's move ahead Let's move on now and let's come to the sign convention Before we move on to that, let's look at the usage Uses of concave and convex mirrors What is it because there are MCQs on UGC also based questions have started coming nowadays so you Understand the usage son, it is very important See what are the uses of concave mirror Uses of Concave Mirrors What are they, what is their first use That of the concave mirror is your torch i.e. What is a concave mirror that can magnify I've been putting things to one side If it is there then search is useful inside the torch Lights are useful inside your vehicle that is useful in headlights It is useful inside a shaving mirror To see the face bigger, visit the dentist It is useful inside so it is useful inside the furnace whereas your convex mirror

37:31 happens when he makes things smaller then he Where do you find the rear view of your vehicle? As you look inside you see who's behind who's behind yes rear view rear view mirror Mainly this comes to your mind during work because it shows you the larger area ok son let's go this was a question Look at that question, name the type of mirror used Two design solar furnace just told which one Mirror, tell me which one is in the solar furnace Why are concave mirrors used Because in solar furnace neither light is used nor We have to focus on a place and on one place we need to focus Whose did you understand, did you understand, it's concave's, come on? next next state the type of mirror in

38:19 Headlights The headlights of your vehicle I just told you which one is it, it is concave is the rear view mirror next to the rear view mirror Who is inside the Why does it happen because with convex you You can see a wider view Wider view Wider Is the view visible to you? I understand this I am a child writing butt attack cross prashant bhaiya come on what's the matter what's the matter Son, you have become very smart Friend, when did you become so smart these days? When will you become smart, come brother, the question is yours The following terms have been defined You need to define some terms poll center of curvature principal axis

39:04 Everyone knows the principal focus, it is defined he will also do the b part see, consider it The following diagram in which m is the mirror and p is the object and q is the Magnified image formed by the mirror state the type of the mirror look brother one This is a mirror, this is an object and its image is formed She is here and that image is getting bigger A big image is being made so tell me which one Which mirror will it be? This is a very good question, son. Brain use your mind Brother, when will you hoist the flag There will be a flag, we will meet soon

39:51 absolutely absolutely absolutely everyone will come to meet We have meetups in many cities for We will do it as soon as your paper is over in March You will meet everyone at the end in Delhi We meet in many places like Patna, Lucknow etc. If we come, we will meet, right? We will be happy with each other Those seminars are going to happen soon I will meet all these girls Please don't touch my feet when you meet me don't touch me you are causing me to sin don't do it please do it, it is there too when we meet If we go, we would have to make an announcement that please girls don't touch my feet please don't do this it's ok boys come and get the boys oh yes it's okay Brother which one is it, this will be your concave Why would it be a mirror, son? This is a concave mirror.

40:37 use your brain because it is a simple thing if your object is here where is the mirror is between the focus and the pole of the and you look How is the image being magnified Magnified Image Anytime Convex Mirror A large image can never be formed in convex I don't get along well, I always pretend to be small I had only this in which I could become And it can only be made in a concave mirror Very good now let's talk about sign About Conventions and Numericals You will see that it will be very easy to do numerical quickly It is important that you come first, son Note that this is your mirror. Your mirror is fine, no matter which mirror it is Son and no matter what lens it is, it's a sign I will tell you the convention will be valid for everyone Listen to something with your ears and mind open It will be in this direction on the left side

41:25 Look at me son, this is how I am It is left or right whenever something is on the left if it is on the side then it will be negative whenever If something is on the right side then it is positive it will be okay whenever something will be on the top So it will be positive whenever any thing is below If it happens then what will it be, it will be negative, okay That's just the sign convention whether the lens is Even if it is a mirror, don't use your brain with this technique use left negative right positive up positive down negative just just son so okay now son let's understand that bhaiya this technique You need some tips on how to use it You will have to know the formulas, first of all there is a mirror The formula for which is 1 / v + 1 / u = 1 / f in which v is what v is what happens is this is the distance of the image

42:10 is the distance of the object and this is your Focal length what is this son your focal length okay now tell me one thing is this your Concave mirror in the direction of its focal length it happens here, suppose from here to here If its focal length is then the concave mirror Will the focal length be positive or negative? Tell me quickly in chat bhaiya will you come Let's see Kolkata friend, probably Kolkata's yes, I don't know exactly right now The announcement will be made, don't worry about it tell me what are you feeling what are you feeling I have caught the negative very good left whatever is on the side negative well now one tell me something convex tell me something convex

42:57 The focal length of the convex lens in this direction is If it happens then how will it always be positive hogi means concave mirror will always B What are negative and convex mirrors? I will always be positive okay and I will give you I will tell you a very good technique make it clear in your mind today that the concave Whether it is a mirror or a lens or a concave Whether it is a mirror or a lens, its focal length is always The length will be negative and convex Whether it's a mirror or a lens, whatever you have Its focal length will always be positive, okay So first of all you understood this, next The thing is magnification magnification Son, what is this ratio, what is height of the image divided by the height of the object

43:45 There is another formula for this, which is is v/u of minus - v/u ok son - v / u Okay now I will tell you the questions I will get it done but I am telling you the technique And understand the technique, son, what you have to do I am telling you a pattern of questions. Here you have given u inside the question and If you are given f then which formula will you use? will you apply it son 1 / v + 1 / u = 1 / f will you apply it And with the help of this you will find out yes or no son, you will take it out, I will tell you the truth, you will take it out, okay yes I will ask you the question right now as soon as you v Take it out son, what should you do now? Magnification has to be taken out which is - v / u It is ok if the magnification value is If you see a negative sign then understand that

44:30 The image that has come is real and bigger than real brother who is inverted tell me and if If your magnification comes out positive Assuming that the image is always virtual And what is virtual's older brother, what is erect? Did you understand this? Tell me quickly what it is? Will you remember this always? Yes, brother, I will definitely remember what you are saying. If yes, then why wouldn't you remember me, you are my friend I have said that, that is enough, now there are questions I will get it done, it is a very good technique kid If you are confused about magnification What if a negative sign appears? Real and if it comes positive then always I am talking about virtual sign negative positive ok magnification value Any amount can be there if the magnification is value two is coming was coming four is coming if it is then it means that the image is big

45:18 Magnification value 0.2 0.4 or 0.8 If any such value is coming then the image what is it small okay and negative and What does a positive sign mean and what does a negative sign mean? means virtual bus of real and positive I will question all the problems now your problems will go away let's go Let's ask normal questions, then we will ask tough ones tell me student want to get an erection Image erect i.e. virtual image of an Object using a concave mirror is a concave mirror He has to form an erect image using a mirror And its focal length is 10 cm. So where should he place the object? It is very simple, children do this in their sleep We can do it like this brother, it is very simple

46:04 Friend brother what is there in this what are we in this Is this how we do it so if yes It is very simple, the image is always your virtual and When does it become erect, when it is near the pole and focus The focus is in the middle, where is it 10 In the question on centimeter, given is 10 If it should be less than centimeter then answer should be Be less than 10 centimeters, move ahead son Let's increase the next question let's see n student conduct an activity using a flask of a Height 15 cm and a concave mirror only Finds the image formed edge 40 to 45 cm in the height what is the magnification tell me Brother what will be the magnification of this case

46:50 Tell me quickly inside and what has he done Look son, what has he done image Which mirror is used? Concave mirror This is a very tricky question, this is a tricky question you will do wrong this is a tricky question tell me what you do wrong tell me quickly -3 will come please see what is the formula for magnification The son formula of magnification is Remember minus v by y means what will this be your minus the v which is how much is 45 it is 45 right and how much is u u is your 15 but You forgot one thing that in concave mirror

47:36 Look son, assume that this is a concave mirror it's a concave mirror okay this is your concave mirror If there is a mirror, then son you would also have been here in it is u also suppose the object is here u also happens in this direction and v also happens in this direction The image is also created here in direction isn't it, this is what is made in concave no i.e. v The value will also be negative what is the value of v is -45 and what will be the value of y 15 Okay, now solve these two problems. What should I do? Put a minus and it goes up If there will be minus minus cuts below then this Will remain minus Kath, did you understand this? what did you understand tell me quickly it is the same son the answer is not d yes d no a is the answer

48:24 fool oh fool what are you talking about ok one minute one minute ok so the height has been given sorry sorry sorry sorry One minute one minute wait wait wait r r o o o I was just checking your height then look at a concave mirror Where is the object? The object is yours. have to look up son where is the object Your object is above you and where is the image tell me where is the image oh tell me friend, where is the image, use your mind The child used his mind to find out where the image was. I caught him, the child said, this is wrong, it is wrong yes yes yes it is wrong yes it is absolutely correct absolutely correct

49:10 A lot of kids are giving me A's It happened bhaiya it is not mine because this height You have been given the height so look at it son what did you say this is your object what is yours is your object and whatever Your image is made with the help of concave mirror An image is formed with the help of a concave mirror the image is created with the help of ok what is that image That image is big, what is that image, son? how is that image that image is big ok how is that image that image is big then you There was nothing to do in this, understand one thing Son, do you know the value of magnification? So 45 or 15 will come out to be three If it happens then it will be three but you should keep this thing in mind You had to keep this thing inside your mind I had to keep in mind that there was a game to be played with you here

49:57 here's what's going to happen to you there's gonna be a game because concave mirror Given here is a concave mirror What is it here yes it is given now understand son there is something above So if that positive image of yours is forming below if yes then what will be that image if yours is below if it is there then what will it be, it will be negative so it will be negative how will it be negative By the way, look inside this question of mine According to this you should have a data and given Was the data supposed to be given that the image Is it being made behind the mirror or in front of the mirror? because this can also happen that it is not It is possible that your image may be created here, tell me. it may be possible it may not be possible It is also possible that the image is created here

50:43 maybe maybe then its +3 -3 son Both should have been there, if there is an answer The question would have given that it was being built behind if the image is being formed behind then you would know that the image is if it is made virtual then you should have told me that The value is three if it were given that the image If it is being made on the same side then you can calculate the value of m If you had given -3 then if you had given -3 then both of them would have been inside it The value of a will depend on 3v -3b it will depend on where it is yes it will depend on where it is, this is correct If it is 3 and -3 then it will depend on where the image is formed is it on the same side or on the back side ok Hey brother let's move ahead, see the next question Go and understand this object, it is important

51:28 also n object and it comes from here Your important questions start right here So brother which one is correct, I told you I told you that if there is a question within a question It will be incomplete if you see the same side of the mirror It is said that real image will always be formed, so of m The value will be negative and the value will be positive okay let's say an object is place at a distance of 10 centimetres from a A convex mirror is a convex mirror so what will happen you have been told a convex my love son which one is it Remember convex, convex is like this is a convex mirror whose focal length is Length you are given 15 nice convex How is the focal length of a mirror positive or negative positive 15 cm ok understand the next thing You are told that there is an object which needs 10

52:14 If you keep the centimeter in this direction then The object will be - 10 cm now see what It is said that find the position of the image stating the position tell me the position of the image tell me the position of the image tell me tell me tell me tell me yes yes how tell me it is very simple very simple You just had to apply the formula in it I have to take LCM and what to do with the question I have to give it to you, I have to solve it, brother. I will take you here bhaiya and baavi that the value which will come from that, son, of Baavi, The value will come, it had to be added to this How much will it cost? Take 1/1 or 1/10 LCM, son.

53:01 What is the LCM coming out to be 30 no it will come 2 + 3 isn't it 1 baavi's If the value comes then the final value that will come will be 1 How much will Baavi's come 1 Baavi's final What will be the value? It will be 1/6 no, it is coming out to be only 1/6, son, the value of v is It will go 6 centimeters, what is the matter with everyone has the calculation come? everyone's calculation is the same good very good so here is your The image is formed, the image is formed, how much has it come 6 cm how much is 6 cm what is it I understood what I was saying, I understood it quickly Tell me it's here, it's done, it's done, now think about it If you are asked to remove the magnification How to find the magnification m = - v ba u

53:48 okay take out the minus value of v how much is 6 centimeter minus 10 cm is then minus The minus will be deducted and this will come out to be how much this will come out to be Yours will go 3/5 and that too what is this plus sign It is telling that the image is a virtual image Virtual yes or no, yes or no, now I understand What Magnin's concept was explaining is that Whenever you get a positive sign, say yes this happened no, this happened yes this happened Very good son, you understood that this is virtual Magnification reveals if the result is positive If it goes virtual then if it goes negative then it goes real You should understand, come on son, ask more questions Let's ask some good questions

54:34 Come on brother, show me a good question Look brother, now here is a good question. object is 4 cm bro its place at Assume 15 cm in the front of concave mirror This is a concave mirror in its front The object is placed 15 cm away That means the value of u will be - 15 cm It is kept here, okay, what did he say? What is the focal length of a concave mirror What is the length, tell me whether it is positive or negative two tell me do you remember or not tell me negative Excellent focus mine is looking 10cm ahead are you at what distance from the mirror should you be Be a screen Be a place to obtain a sharp

55:20 Image i.e. I want to have a screen If the image comes on it then I turn off the screen Where should I put the screen, where should I put it brother? See, these are the questions on the screen There is no need to get confused as the screen is there will keep it where the distance of the image will be What do you want to include in this query? Basically you have to remove v, nothing else have to do v take it out and that is what will happen The screen distance is ok son, yes Yes it is very good, right? Yes it is very correct Ok son, I understood what you were saying what's next, the kids have found out the answer as well diya calculate the height of the image and you If you want to find out the height also then come brother find it out What is the formula 1 / f = 1 / u + 1 /v You have to find out 1 /v, then 1 /f What is the value of minus 1/10 of this

56:07 How much is the ratio of 1/1 + 1 / v to this son If you take it here then it will become 1/1 - 1/10 Son, do the calculations yourself, my face what are you looking at my face what are you looking at I agree I am so beautiful, so beautiful but such It's not like he'll keep looking at my face It will be fine if you write it 2 ma 3 = 1 / v so v that the value that is coming to you is coming -30 cm i.e. in this direction Minus in direction means in this direction how far am I 30 cm away okay now I want to tell you how to find out your height Remove the magnification of the image first Magnification happens - v/u i.e. son what do you have to do what is the value of v

56:54 The value of is -30 and what is the value of y -1 then these will be cut and this will be yours If I cut the minus sign, the magnification will come Cut the minus we need to find the height of the image you know another one of magnification What is the formula for height of image divide by height of object yes i remembered I remembered, I remembered, now look at the object height is given somewhere the height of the object is given it is absolutely given it is absolutely given yes yes bhaiya why not give it then it will come your -2 itu height of image divided by 4 centimeters is how much so take it here If you go then the height of your image will come How much will 8 cm be? Will everybody have 8 cm? it is happening yes it means minus aa minus aa means what if the image is upside down

57:45 Vomit ok listen tomorrow's session is how to Reproduce in Organist Of Listen, tomorrow's session is on how to orgasm I check the produce once Has the team scheduled it? has the team scheduled one minute I'll check it out, son, just a minute just a minute if you have done that then go and Turn on your notification on it and go quickly Turn on both like and notifications so that tomorrow Do you remember to come here, brother? Yes brother, I have to come back here soon Go quickly and go live back on this only The likes will be visible beyond that in the live section do it and turn on its notification and then come back to live come back to live Isn't it yes and if you do it then write here done

58:31 It's done, done, done, I will do it brother, done, okay Is yes it's okay it's done ok Good, very good, do it son, come now Go now come back I have done it, write a child It is happening but brother I am watching it on TV How can I get back? No problem son. Small things happen in big cities It stays come on let's come to the next question oh ho yes this is a very good question, this is a big one good question, everyone has come You are a liar, I am seeing that not everyone did it I am looking I am looking I am Neither does that meme work, I have heard it I had heard it, I am not blind hmm isn't it yes come on brother next question Let's see, the next question is on some data. question with data is good look at a data I have given it to you, inside which there are three concave

59:18 I have taken mirror A B C how many A B C now look carefully this is yours this is yours Son, look carefully at this mirror what is its focal length what is its focal length 20 is for B, 15 is for C, 30 and The object that we have kept is the object hey Bhaiya, I had to come back to the same stream Have you sat down? Do we have to come back from there? The kids are sitting and chilling, so 20 15 years old what is this this is son focal length and that of your object The distance given is 45 30 and 20 now son is asking some questions look at these The same of the above cases will have the mirror form Where is the diminished image

1:00:05 tell me where to create a small image and color data Colour data color data color where are you writing the data you fools where are you writing the color data what is data which data to color in it where is the data you should have checked it now If there is color data then it's ok Mirror Diminished Now the mirror has made a small image brother What kind of small image will be formed, think for yourself and see if If you look at this case, where is the object? Look at the object that is too far out of focus son this object in a concave mirror is here but and this is its focus so its center Where will the center of curvature be? it will be at 40 centimetres now look at yours whenever

1:00:50 Whenever your object goes beyond Remember whenever there was a center of curvature Your object is beyond the center of curvature If it was there then how would the image have been created? It would have been smaller and where was it formed between the focus and the pole I used to be made i.e. in this case bhaiya A small image will be formed. Let us see the next case now. what are you saying it's on 15 what's yours 15 The focal length is and the object is at 30 ie where is the object the object is center of on the curvature and whenever the object center of If it is on curvature then the image is always the same You will remember the size of the Everyone remembers what the center of curve is yes it is very good so how will be the image It will be exactly the same size here as it was If it is like that then it will not become smaller here, next one

1:01:36 look at this if the focal length is at 30 and The object is placed at 20 i.e. pole and focal length If the object is placed in the middle of the length then how will it look The image becomes virtual and erect and it becomes bigger, then it is not even in this case That means the answer to the first one will be A, that's fine Next let's see the list of properties of the image form in the case to see which case to There will be no image in it which will be of the same size and The same point will be formed i.e. center of There are two properties that will be formed on the curvature Its next what is the nature and the size of Image in the case C Case C inside case C It will become virtually erect and bigger and How is this becoming, if you accept that it is your mirror The back side of the mirror will be made behind the mirror

1:02:22 did you understand this thing that will be directed towards Did you understand it? Yes sir board question paper prashant bhaiya one shot son This is where the paper comes from, this is where the paper will be made Who knows it will be printed like this in the paper this question comes ok yes ok you got it

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