Fermat's Principle to Snell's Law (Derivation)
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- Опубліковано 11 вер 2024
- Light has a peculiar property. When a light ray goes from one point to another, it travels via the path that takes the least amount of time. This is known as Fermat's Principle. Or, Principle of Least time.
The Fermat's Principle can be used to explain why light bends as it goes from one medium to another. It can be used to prove the Snell's Law which gives the relationship between angle of incidence and angle of refraction.
In this video I discuss these above things.
Interested in moreeeeee....?
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Finally video with chalks and boards
Is it only me or others also feel these videos are better than the one where he shows his computer screen?
I just posted the same comment above and saw your comment. Lol
I agreeee
Your way of delivering content extremely effective and easily understandable thank you so much sir you are awesome
Your explanation is quite unique...
Please choose a series
First of all, how you have taught nuclear and particle physics is just outstanding!! These lectures are very good to learn and understand physics.
I have a demand that please make a series on details about Standard Model and Beyond Standard Model Phenomenology (Including Neutrino physics, dark matter physics, collider physics, lattice gauge theory etc) using QFT treatment. It will be really helpful to learn Standard Model from you
Perfect physics teacher❣️❣️❣️
On the right side of your equation, you wrote [(n2(L-x))/(c(sqrt[(L-x)^2+x^2]))]. I think that you meant to write [(n2(L-x))/(c(sqrt[(L-x)^2+(y2)^2]))]
Perfectly done and explained, I love your enthusiasm sir.
The most underrated channel on physics... stunning explanation
BEAUTIFULLY EXPLAINED SIR
Great video.
But there is a little mistake in the denominator (hypotenuse) in the right term. You used x² instead of y2².
Your style of Chalk and talk is the best.............
Please Please Do share your knowledge on competitive exams like CSIR NET.
Great video. Appreciate the great service you are doing to make physics very very nicely.
This video does explain how Fermats Principle implies Snell's law. Why light behaves like this is probably explained better through Huygen's wave theory.
Requesting for a follow up video ☺️.
Perhaps now at quantum level there might be some other theory which I have no idea about and it would be great if it can be covered.
Sir keep us taught using this green Board. It looks so good like classroom.
That digital marker and digital board doesn't feel like that.
Love it!, you are the best physics teacher I have met
Really ur rockstar of physics what an explanation sir... Really awesome
Sir is on blackboard again!
Finally chalk and board again!!!!!! 🔥🔥
I was exploring answer of the question why light is in hurry. And it's still a question. By the way your video are always good.
Amazing session
Beautiful proof
Sir I saw your nuclear physics videos . Can you suggest a book ? Please
Thank you, sir!
Sir, Pl clear these doubts
[A (1) How you fixed Points A & B. ( 2) In the differentiation how you treated 'x' is variable and 'y' is Constant.
[ B ] Pl. correct the second part where t= { 1st part } + { second part }*
{C } it is a direct Result from REFRACTION EXPT of Glass SLAB.
Why this much beating about the BUSH ???
Thank you
thank you.
Wasn't expecting that you will teach on blackboard these days. 🙏🙏🙏
I like this more than computer screen videos
Yeah
but how this derivation proves that light can take path which is not straight line
Good job
Sir , I want to talk to u.
Any method?
Please let me know sir🥺
This also proves faster than light is possible and mass associated with that mass should be phase mass as quanta which depends opon probability.
Thanks a lot sir. But in 9:21 we have considered theta 1 as n1, and theta 2 as n1. So it shouldn't be n2/n1 right...?
Thank you sir
Excellent Expain sir 👌👌
nice explanation bro
Correction, on the LHS, it is y^2, not x^2.
never thought of it that way
7:11- the (x)^2 is actually (y2)^2
Sir i want asking you. Sir when you started jam new batch.. I am eagerly waithing your new batch for iit jam.............. Please tell me sir🙏🙏🙏🙏
Yes. i am also same doubt. Pleae tell me sir
Sir, I have a question not related to this topic. I like the board you use for teaching. What material is it and where to get it from?
As my prospective Hypothetical ether also exists in which light moves faster equivalent to Higgs field.
Please do justice to this problem:
Q) Two identical charged spheres suspended from a common point by two massless strings of lengths 𝒍, are initially at a distance d (𝒅≪𝒍) apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity 𝐯. Then 𝐯 varies as a function of the distance 𝐱 between the spheres, as:
(a) 𝐯∝𝐱^(𝟏/𝟐) (b) 𝐯∝𝐱 (c) 𝐯∝𝐱^(− 𝟏/𝟐) (d) 𝐯∝𝐱^(−𝟏)
Please bhaiya, do make a easy video on this, and please don't assume equilibrium instantaneously as everybody else does to solve this. Also please make this video 12th Grader friendly, don't use langrangian etc.
Please please make a video explaining this problem in detail.
Plz start optics lectures
Thanks sir 😊🙏🙏
Please upload video on tensor
How do light know before entering to medium which is shortest path?
Correct me if i am wrong but shouldnt we incule 2ydy/dx as well because if you apply chain rule on 1/2(y^2+x^2)^1/2 we get an extra term which yiu didnt inculde why?
Derivative of y wrt x will be zero because y is not dependant on x only derivative of x terms will be there
Sir if i want to prepare cris what shuould i do
Sir poore youTube pe classical mechanics csir net ke liye karane vala koi nhi mila... Sir please aap kar dijiye
SIr quantum mechanics ka perturbation theory padhaye pls.
Sir, I am Dinuwara. I am still 15. I need to contact you directly to interrogate some questions. Can you please render me anything for that
From Variational Calculus we know " If a particle will go to point A to point B, for the least time the path will be a cycloid" - which is known as the famous Brachistochrone Problem in Physics, but, in contrast when light goes from point A to point B light takes the path for which the time is minimum (generally, the Fermat's principle) and the path is straight line, not cycloid.. Why so? 🤔
Consider watching 3blue1brown video on this .
@@nobitanobi7069 give me the link of that video
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Please check nimbus education
He is also a great guy like you