Fermat's Principle to Snell's Law (Derivation)

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  • Опубликовано: 2 янв 2025

Комментарии • 63

  • @randomkeyboardsmash
    @randomkeyboardsmash 3 года назад +30

    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?

    • @HimmatBording
      @HimmatBording 3 года назад +3

      I just posted the same comment above and saw your comment. Lol

    • @unnati_hulke
      @unnati_hulke Год назад

      I agreeee

  • @mahendramosalpuri8928
    @mahendramosalpuri8928 3 года назад +22

    Your way of delivering content extremely effective and easily understandable thank you so much sir you are awesome

  • @bilalphysics4872
    @bilalphysics4872 3 года назад +11

    Your explanation is quite unique...
    Please choose a series

  • @chandanaprasad6258
    @chandanaprasad6258 Год назад +1

    The most underrated channel on physics... stunning explanation

  • @AnirbanMajumdar-ti9su
    @AnirbanMajumdar-ti9su 3 года назад +9

    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

  • @chanakyaprasad2118
    @chanakyaprasad2118 3 года назад +2

    Your style of Chalk and talk is the best.............
    Please Please Do share your knowledge on competitive exams like CSIR NET.

  • @toastedsniper9248
    @toastedsniper9248 Год назад +2

    Perfectly done and explained, I love your enthusiasm sir.

  • @justinkhanyadav226
    @justinkhanyadav226 3 года назад +2

    BEAUTIFULLY EXPLAINED SIR

  • @surajpurohit467
    @surajpurohit467 3 года назад +2

    Perfect physics teacher❣️❣️❣️

  • @AbhishekAbhishek-tx7em
    @AbhishekAbhishek-tx7em Год назад +1

    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...?

  • @davidgiambra874
    @davidgiambra874 2 года назад +8

    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]))]

  • @chinnagunttilakshmikanth9116
    @chinnagunttilakshmikanth9116 Год назад

    Really ur rockstar of physics what an explanation sir... Really awesome

  • @ebutuoy201102
    @ebutuoy201102 3 года назад

    Love it!, you are the best physics teacher I have met

  • @ankitnautiyal2568
    @ankitnautiyal2568 3 года назад +2

    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.

  • @doutormanhattan5680
    @doutormanhattan5680 Год назад +2

    Great video.
    But there is a little mistake in the denominator (hypotenuse) in the right term. You used x² instead of y2².

  • @ajayshukla7773
    @ajayshukla7773 3 года назад +1

    Amazing session

  • @purabimondal6270
    @purabimondal6270 3 дня назад

    6:28 time period is not zero, it is the minimum or maximum (but there is no maximum for the x-t curve as it is a bowl shaped parabola, so minimum is the only option). dt/dx is 0 at this point

  • @PhysicsFunwithDharmeshKareliya
    @PhysicsFunwithDharmeshKareliya 3 года назад

    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.

  • @HimmatBording
    @HimmatBording 3 года назад +3

    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.

  • @vishalmishra4081
    @vishalmishra4081 5 месяцев назад +1

    but how this derivation proves that light can take path which is not straight line

  • @physicsvideos6394
    @physicsvideos6394 3 года назад +2

    Sir I saw your nuclear physics videos . Can you suggest a book ? Please

  • @rajatverma3931
    @rajatverma3931 3 года назад +2

    Finally chalk and board again!!!!!! 🔥🔥

  • @anandmohan9037
    @anandmohan9037 2 года назад +1

    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 ???

  • @manansharma9164
    @manansharma9164 3 года назад +2

    Sir is on blackboard again!

  • @joseftrojan7664
    @joseftrojan7664 3 года назад +1

    Thank you, sir!

  • @prateeksharma6756
    @prateeksharma6756 2 года назад

    Beautiful proof

  • @TANUJKUMARPandey9999
    @TANUJKUMARPandey9999 Год назад

    7:11- the (x)^2 is actually (y2)^2

  • @ramadevisandireddy9821
    @ramadevisandireddy9821 3 года назад

    nice explanation bro

  • @tiruveediveeraraghavulu4447
    @tiruveediveeraraghavulu4447 3 года назад +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🙏🙏🙏🙏

  • @gauravtambe824
    @gauravtambe824 3 года назад

    Excellent Expain sir 👌👌

  • @abhijitshaw9431
    @abhijitshaw9431 3 года назад

    Please upload video on tensor

  • @srijanraman4361
    @srijanraman4361 3 года назад +1

    Wasn't expecting that you will teach on blackboard these days. 🙏🙏🙏

  • @AmanDeepSingh-dd4uq
    @AmanDeepSingh-dd4uq 3 года назад

    This also proves faster than light is possible and mass associated with that mass should be phase mass as quanta which depends opon probability.

  • @sciencefatcz669
    @sciencefatcz669 3 года назад +1

    Sir , I want to talk to u.
    Any method?
    Please let me know sir🥺

  • @muhammadmehmoodahmadmalik4494
    @muhammadmehmoodahmadmalik4494 10 месяцев назад

    Correction, on the LHS, it is y^2, not x^2.

  • @info-hub457
    @info-hub457 Год назад

    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?

    • @LHGaming25
      @LHGaming25 Год назад

      Derivative of y wrt x will be zero because y is not dependant on x only derivative of x terms will be there

  • @phyfix
    @phyfix 3 года назад

    How do light know before entering to medium which is shortest path?

  • @pablobryan4363
    @pablobryan4363 2 года назад

    Thank you

  • @pardeepchhikara2170
    @pardeepchhikara2170 2 года назад

    thank you.

  • @NarenderKumar-dp9te
    @NarenderKumar-dp9te 3 года назад

    Sir if i want to prepare cris what shuould i do

  • @monk_47
    @monk_47 3 года назад

    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?

  • @NRUSINGHAPRASADMAHAPATRA
    @NRUSINGHAPRASADMAHAPATRA 3 года назад

    Thanks sir 😊🙏🙏

  • @ErichAmMeer
    @ErichAmMeer 3 года назад

    Good job

  • @MuhammadIsmail-oj3sj
    @MuhammadIsmail-oj3sj 3 года назад +1

    Plz start optics lectures

  • @rakshith4751
    @rakshith4751 3 года назад

    never thought of it that way

  • @زينالعابدينماجد-خ1خ

    Thank you sir

  • @AmanDeepSingh-dd4uq
    @AmanDeepSingh-dd4uq 3 года назад

    As my prospective Hypothetical ether also exists in which light moves faster equivalent to Higgs field.

  • @harry-ho9ti
    @harry-ho9ti 3 года назад

    SIr quantum mechanics ka perturbation theory padhaye pls.

  • @AmanVerma-vv2hc
    @AmanVerma-vv2hc 3 года назад

    Sir poore youTube pe classical mechanics csir net ke liye karane vala koi nhi mila... Sir please aap kar dijiye

  • @philosophyofreality1739
    @philosophyofreality1739 3 года назад

    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

  • @akthegamer5110
    @akthegamer5110 Месяц назад

    Why diffrenciation with respect to x not y if y is done answer is not right

  • @arnabkumardas8640
    @arnabkumardas8640 3 года назад

    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? 🤔

    • @nobitanobi7069
      @nobitanobi7069 3 года назад

      Consider watching 3blue1brown video on this .

    • @arnabkumardas8640
      @arnabkumardas8640 3 года назад

      @@nobitanobi7069 give me the link of that video

    • @nobitanobi7069
      @nobitanobi7069 3 года назад

      @@arnabkumardas8640 ruclips.net/video/Cld0p3a43fU/видео.html

  • @Vishal-bz6vy
    @Vishal-bz6vy 3 года назад +1

    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.

  • @globalcuber9816
    @globalcuber9816 3 года назад

    Please check nimbus education
    He is also a great guy like you