Absolutely satisfied, I wish ncert also update its book with your explanation for a mirage..

Sir aapki video mil gyi toh bass . Dhanye ho gye 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

सर जी आप बहुत महान है आप को कोटि कोटि नमन।

I think two rectification is needed to think in right direction. 1 The angle of incidence is not exactly 90degree but very close to 90 degree 2.considering the layer of atmoshpheric layer at micro level .then the confusion of TIR will be solved .TIR happen but with very large angles close to 90degree.then his concept of bending is right .the ultimate trajectory will be parabola symmetrical to x axis .

Sir sorry to say but u did not talk about the bending back of light at the vertex of the parabolic path. I think that if we are considering the refractive index to be changing gradually, then the ratio of refractive indices of two consecutive elemental layers will be close to 1. So if anywhere in this setup, Total Internal Reflection (TIR) has to happen, by snells law we can find that critical angle C = sin^-1 (n2/n1) where light is going from medium with refractive index n1 to medium with n2. As I've said earlier, since the variation in refractive index between two consecutive elemental layers will be very less, the ratio n2/n1 will tend to 1 ( a little less than one actually) . So critical angle C will tend to 90° (a little less than 90°actually). That means, if anywhere in this setup, TIR happens, it will happen only when incidence angle tends to 90°. So as u explained, initially only refraction will happen and the first half of the parabolic trajectory will be there. But then at the vertex, as soon as the tangent is about to become horizontal, the angle of incidence will tend to 90° and so TIR will happen. That's why light ray should bend up again JUST BEFORE reaching the vertex. If light ray had reached vertex of parabola and had become horizontal once, then it would have always remained horizontal forever bcoz there is no change in refractive index horizontally The method u used can help us find the trajectory of the part where REFRACTION is happening, but the light ray will bend up only bcoz of TIR, that's what I concluded. Am I correct?

Mr Verma is god of physics for me. Because Alakha sir follow verma sir .so for me he is legent of physics.....

Then sir fir q hume glt pdaya jata hai...... Aap iss chiz ko aage bdao aur apne name se iss chiz ko explain kro sir ...

This is brilliant 👌

Agathiya muni and Ayyanar Lord Muruga blessed prof.H.C.Verma.

Sir what if refractive index of air is not linearly increasing and there is no any critical point at the time of refraction and angle of incidence suddenly become greater than critical angle and the reflection occur

Wow wowwww legend of physics❤🔥💚

Love from Bhagalpur ,Bihar sir aapke lectures bahut acche hain. Best Physics teacher .

Congratulation sir for padma shri

Sir, would have been better if you would have explained wheres the fault in TIR explanation and why have you assumed gradual variation of refractive index is linear?

Awesomely explained...Thank u sir....U just sweeped away my doubts...

Best part Hum apni laboratory me mirage banayenge Which is usually can't done in schools... Thanks sir😍😍

Sir you are one of world's best teacher

Agathiya muni prof.H.C.Verma always excels.

I want to make a humble point here! Both your method and total internal reflection method are correct. Your method explains why it has to bend, theoretically. TIR method tells how it bends, practically. So both are correct. The question of incident angle being 90deg has no meaning. Because in that case, the light ray is not touching surface at all. Also there's no need for the ray to get until 90deg to get totally reflected. So from my point of view, both styles of explanation are correct. If anybody has another point of view, we can discuss here 😊

i like your teaching style so muchhh

But can TIR be totally ruled out? Small deviation from critical angle is quite possible. Gradually increasing and then decreasing ( after reflection) angle of incidences will also make a light ray traverse a path. similar to a parabola.

Boy question..10the level Sirs answer ...😓😓😓

Y square = 4ax , has axis along x axis

The law of refraction was discovered by the Arabic scientist Ibn Sahl in 984 AD. Snell wrote down the equation in 1621 AD. Earlier we did not know about Ibn Sahl so credit was given to Snell. But now that we know Ibn Sahl found the law more than 500 years earlier, it should properly be called Ibn Sahl's law. Look at the Wikipedia article on Ibn Sahl.

Sir , may be bending it light is due to internal reflection. as refractive index gradually decrease so reflected light is partially refractured and reflected when it fall on interfere of rarer and denser medium Refracted light shiws bending... I m

Sir how far the actual object is from the place where mirage occured?

Sir with due respect it will still not explain the behaviour of the ray at the vertex. I agree with the parabolic shape of the curve but why it bends is still unexplainable.

Sir you are man of humane And your expression is full of simplicity

Wow sir! Thank you so much.

Why are some objects opaque and some transparent?.

If there is parabola, vertex is one point.So,the incidence angle must be less than 90 degree &greater than critical angle.So,it is formed due to the reason for TIR.Hope,this comment,HC Verma sir will see and reply.I respect him very much

Sir after total reflection the light again travels back from rarer to denser medium so it moves towards the normal while passing thru every layer so it apears that it bends

Is it tan or cot?

Sir, I think angle of incidence 90° hone se pahle hi total internal reflection ho jayega isliye 90° vali situation nhi aayegi. Neeche se curve smooth nhi hoga

Sir I have a doubt,that the actual curve of a mirage should not be a parabolic its just seems to like parabolic...if that is right then in that case how one can able to explain that mirage concept of using your this explanation where as your final result shows that curve should be like a parabolic curve!?

The experiment is great....

Sir can't this be that their are infinite.interfaces as if we consider.dl^2 has one.interface then their will.be infinite interfaces so infinite lines will form.a curve...therefore the curve can be explained by tir

It means TIR cause is wrong if it is wrong then how??

Awesome videos sir....really helpful...

Great

Sir please tell about the eddy current....... And also what is reason behind it for only circulating current

Very easy to understand sir. In simple words we can say Yahan Kai bar ek hi direction me dhire dhire rays ka refraction hua hai . am I right ?

Very nice 👌 Sir, we proud of you to have such a great genius

Sir due to curvature of space time continuum may we explain mirage phenomena? I think mirage actually accur due to variable space time with respect to x due to changing density. You say to keep n multiplied by sin theta constant the path of light follow that parabolic trajectory. Mathematics said that. I have no doubt about it. But if we consider here light is a collection of particle how we explain mirage phenomena? Which force is responsible here to bent the path of photon which have momentum? Please kindly reply sir.

Thank you very much sir for explaining various topics on physics

thank you so much sir..i did'nt expect that practical at end...thank you so much..

Respected sir, in rainbow formation total internal reflection involved or not . I found contradiction in concept of physics part 1 2012 print and foundation science physics for class 10. Forth adition reprint 2012. Regards Nitin nagar class 10th.

Very nice sir

Sir , but in the brachistocrome problem the path of light though a continuously variable refractive medium is a cycloid .

rip the kid of 10th class who asked the question!!

Sir I am radhe krishan kumar Sir why are any object attract each other

Thank you sir Even I thought of a similar reason but in most of the books it was the wrong fact based on TIA

Its bending can be explained by considering huygens principle i.e each point on wavefront behaves like point source.

Very nice doubt clearing class.

Sir , with all due respect, can you please make a video on the transverse nature of light..

Sir I hope that as n is increasing, it may not increase as a linear function of x it may increase on the x^p here, where p is any positive real number?...

I also have some doubts sir...how do I send them to you? please share mail id or some link

Sir this is clear but why in desert we see a fake water like thing instead of image of a tree

Sir , when light comes in water from air then its wavelength change but the colour is not change. While different wavelengths have different colours.

Thank you sir this excellent explanation.

Very good conseft.

Plz sim make all video jee advance and jee mains

for image formation atleast two rays are needed but no one draws to rays to explain

thank you sir this vid helped me a lot :)

Thanks a lot sir for great explanation of mirage. I read books for physics written by you. My dream come true watching you and clearing my doubt

Baba thanks

4:47 in this how nsin theta is equal to constant.

Thanks ...Sir

Sir. When we don't neglect the X^2 term and integrate . The equation we get takes only +ve values of Y. So it tells nothing about what happens after the point (0,0). Also it doesn't give two values of Y for single value of X

Awesome practical

Sir please make a video for class 10 all chapter of physics in deeply sir please make video

Amazing.

Sir you have applied Snell law here but here refraction isn't taking place instead reflection of the light is taking place here. So why have you applied Snell law here?

Very good morning dear sir , Just needed to mention that the output of differentiation obtained is incorrect and so wrong is the integration ' s output obtained . Even the correct output does not resembles to any sort of parabolic equation. It is = -1 -------------- a( (ax)^2 + 2axc )^1/2 Where a =alpha C = n subscript o

Thanks sir

That 10th class student thinking what this differentiation and Integration is!😂 just kidding though!

Is it compulsory that angle of incidence has to be equal to 90°,it could be something else..........

Sir, but why angle i= angle r ? Angle r is angle of refraction, not reflection. As TIR is one type of refraction. ?

Haliday resnik does not say mirage. Wikipedia does not say mirage

Thank you so much sir

Is it wrong that total internal reflection is the cause of mirage?

Sir, as you said, from mathematical point of view it's okey that the light ray will follow Snell's law and curvature of the path will be parabolic. But I didn't get it why light will turn back (the actual physical phenomena that causes the light to bend?)?

It is a great explanation, Sir. But I would like to clarify two points. 1) When you say n sin (theta) is constant, then once the ray becomes horizontal it should stay such as n is not changing anymore thus theta should remain 90 for the rest of the path. It should not bend again. 2) Snell's law is valid as long as light is traveling from one medium to another of different optical densities. But once the ray becomes horizontal, it travels in the same medium. So can we use Snell's law at that boundary?

Beautiful explanation...!!

Sir apne to isse aur complex bana kar confuse kar diya mujhe 😅😅 Ab NCERT aasan lag rahi hai 😂

90 at the bottom is not necessay, it has to be just greater than critical angle, so I think Sir has got this wrong, please check my proposition

Sir plz make videos for class 11 refering your book CONCEPTS OF PHYSICS

Actually their is no real example of internal reflection, because their is a part of refraction also.

Sir plz explain- heat is a form of energy or mode of transfer of energy- its still confusing

Great job

Sir, नमस्कार Sorry first of all, Angle of incident ray will not reach upto 90 degrees but it will be reflected soon after critical angle.

Legend get to know about TIR in 12th😂

Wow

In simple words, Sir has considered critical angle to br 90° at "point" of turn which is only true if the two media have exactly same optical densities. So sir has considered the elemental(infinitesimal small) air-region at the point of turn, to have uniform optically density, but this is not exactly true bcz we know the air will be rearer below than above, though infinitesimally for elemental region, hence critical angle won't exactly be 90° which implies that at just before 90° TIR will indeed occur Also, i suppose, that the path won't be a perfect parabola🙄

Sir the angle is measured relative to perpendicular but why sir ? We can take the incident ray making an angle with surface rather than with normal

Sir I agree with parabolic path for which nsina=constant but this is equally applicable If light go straight with making angle 90 degree because still nsina=constant there then why they change their path

Sir I hope you have a great knowledge about your subject, then can you please explain how esters are formed in fruits.

An Eye Opener for teachers too.

I am your great fan sir

Great explanation sir....👏👏👏 With all due respect i want to say something.... I think this kind of explanation will not help to the students of class 10.