Huygen's principle of secondary waves | Wave optics | Physics | Khan Academy

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  • Опубліковано 13 січ 2025

КОМЕНТАРІ • 138

  • @tia568
    @tia568 3 роки тому +339

    sometimes i wonder how the ancient people understood the theories and principles without animations...we're so blessed. thank u!!

    • @shivanisoni3339
      @shivanisoni3339 3 роки тому +31

      They had an amazing power called imagination and their hypothesis too are so correct, which are based on these imagination only.

    • @879-0
      @879-0 3 роки тому +9

      Imagination is everything

    • @zakirshah5060
      @zakirshah5060 3 роки тому +10

      Imagination is important than knowledge in physics Einstein

    • @duggchi5277
      @duggchi5277 3 роки тому +1

      Yes we are

    • @khalidgustavo5903
      @khalidgustavo5903 3 роки тому

      You all probably dont give a shit but does someone know of a tool to log back into an Instagram account??
      I somehow lost the login password. I would appreciate any tricks you can offer me.

  • @hanniehmar8885
    @hanniehmar8885 Рік тому +56

    Huygens principle couldnt possibly be explained better than this, you did a terrific job!

    • @LaxmiVangala-up1xz
      @LaxmiVangala-up1xz 5 місяців тому +1

      That's right

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому +1

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @kperiyasamy216
    @kperiyasamy216 3 роки тому +67

    Still his videos are underratted, hope everyone utilizes it

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @user24180
    @user24180 Рік тому +6

    I DONT KNOW HOW MUCH TO THANK YOU. BOTH MY SCHOOL AND TUITION TEACHERS ARE VERY BAD AT TEACHING PHYSICS AND I JUST GET VERY CONFUSED WHEN THEY TEACH.
    I STRUGGLED SO MUCH WITH THIS CHAPTER AND FINALLY DECIDED TO START AFRESH. YOU EXPLANATION IS AMAZING SIR.
    THANK YOUU SOO SOO MUCH. I CAN FINALLY UNDERSTAND THIS TOPIC. 💙

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @dazaiosamu3660
    @dazaiosamu3660 Рік тому +4

    FInally understood the undeerlying concept behind Huygen's principle. Thanks for all the videos

  • @toluenestar2172
    @toluenestar2172 3 роки тому +8

    You just come up with really amazing questions which arise in curious minds and u explain to a naive really well

  • @Jawaab01
    @Jawaab01 Рік тому +3

    I always had problem in answering questions on this principle but no more
    Thank you
    You're one of the best ❤❤

  • @shifaabuzar4533
    @shifaabuzar4533 2 роки тому +6

    the most underrated channel on youtube. i mean c'mon he explains so gooood

  • @vivekgupta3692
    @vivekgupta3692 4 роки тому +5

    Wow 3 videos back to back .... Awesome thank you 👍

  • @Puh539
    @Puh539 4 роки тому +17

    I just want to say "Thank u sir "

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @arunav_creations
    @arunav_creations 3 роки тому +9

    The teaching is just perfect.❤️

  • @alihasanamu
    @alihasanamu 3 роки тому +25

    Wow so beautifully explained !
    No fears like in those coaching-led videos to get it until exams are finished huff🙃

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @akshayasatheesh1406
    @akshayasatheesh1406 3 місяці тому +1

    Thanku 😊I was so depressed that I could understand concepts for jee from my coaching classes after ur vdo I got a best basic knowledge and now I'm so happy and feeling motivated

  • @Rohan_Mahato
    @Rohan_Mahato 4 роки тому +4

    This is what I was finding. Thanks

  • @UmangShah-105base8
    @UmangShah-105base8 Рік тому +1

    06:08
    Actually here , the wave contribution is proportional to ½[cos(¤)+1] and for the backwards direction cos¤ would be 180
    i.e -1 , ½[-1 + 1] = 0

  • @alibaba-wy1iv
    @alibaba-wy1iv 4 місяці тому

    The way you explain is far more clear than any other source I have found, thanks thanks!

  • @smartview8193
    @smartview8193 3 роки тому +3

    you are the most amazing physics teacher for me.

  • @anushkakohle7769
    @anushkakohle7769 3 роки тому +4

    Thank you so much for the explanation🙏🏻 It really helped me

  • @riyarai1086
    @riyarai1086 3 роки тому +4

    Beautifully explained 🤞

  • @brandideruiter6067
    @brandideruiter6067 11 місяців тому

    I have been struggling with understanding this and this video gave me so many ah ha moments. Thank you so much. Best explanation I have some across. 🙏

  • @bbeee_a
    @bbeee_a 3 роки тому +4

    '' imagining lights as waves and not bullets '' wise words!!

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @pratiee21
    @pratiee21 Місяць тому

    Underrated gem
    Before I watch this I go mad to understand this
    Bro did fantabulous job!!! 😊❤

  • @johnraj03
    @johnraj03 2 роки тому +1

    Thank you very much sir
    Great explanation sir
    I understood every point sir
    Thanks 🙏🙏🙏

  • @VG__
    @VG__ 2 роки тому +1

    4:55 secondary wavelet
    9:29

  • @luwi8125
    @luwi8125 2 роки тому +3

    Thanks for the lesson! :)
    What program did you use to draw the illustrations? It really made them look good.

  • @lumba2692
    @lumba2692 3 місяці тому

    Best explanation I found. Amazing. Can you tell me how wavelenght would affect the angle of diffraction?

  • @nikhiltewari9524
    @nikhiltewari9524 9 місяців тому

    Excellent video and teacher altogether. Commendable job 🎉

  • @aamirahmed7659
    @aamirahmed7659 2 роки тому +1

    Thanks for the amazing explanation.

  • @wavetraced
    @wavetraced Рік тому +1

    7:30 why would the ripples suddenly begin at the slit? Shouldn't they have been rippling from the source?

  • @prayanshsharma1832
    @prayanshsharma1832 Рік тому

    One of the best teacher ever..
    Thank you so much

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

  • @bismayoosaf4156
    @bismayoosaf4156 Рік тому

    Thank you sir..ur way of teaching is really amazing..

  • @PujithaKandula-tm3ts
    @PujithaKandula-tm3ts Рік тому

    Please explain the fresnels diffraction briefly

  • @jetome5909
    @jetome5909 Рік тому

    Explanation in english is what i need 👌

  • @mihreteabgirma6351
    @mihreteabgirma6351 3 роки тому +1

    You are the best! Love you bro🤩 Keep up the good work!

  • @dannyperron6498
    @dannyperron6498 10 місяців тому

    What a good explanation. Thank you.

  • @physicsweb8697
    @physicsweb8697 3 роки тому

    Amazing teaching style...really superbbbbb ❣️❣️❣️

  • @smarthereafter5992
    @smarthereafter5992 4 роки тому +1

    thank you very much for your effort.

  • @aroobsheraz6932
    @aroobsheraz6932 2 роки тому

    you're so skilfull. amazing explanation

  • @mineshbairagi8503
    @mineshbairagi8503 4 роки тому +1

    Fantastic explanation

  • @icarus3797
    @icarus3797 4 роки тому +1

    Thanks a lot ,sir.

  • @ishitarai9050
    @ishitarai9050 10 місяців тому

    Yessss, mahesh sir on the channel

  • @prathameshprafulhole2662
    @prathameshprafulhole2662 11 місяців тому

    This was so damn good!
    I don't have words to describe it!

  • @virupannamedikinal
    @virupannamedikinal Рік тому +1

    Some people are unlucky for having not watched these useful videos.

  • @wavetraced
    @wavetraced Рік тому +2

    3:10 If the light is moving at light speed, how can the secondary waves move faster? Shouldn't any secondary waves be behind a primary wave?!

    • @Shrreyy
      @Shrreyy Рік тому

      I have the same doubt!!

    • @Shrreyy
      @Shrreyy Рік тому

      I think that a secondary wave is just an interpretation of the primary wave after a given time, I mean it tells how the primary wave would look like in the other second or how it will travel.

    • @SriramV.-lq4ms
      @SriramV.-lq4ms 23 дні тому

      Where is it going faster than light? It's simply beginning from a new position to the front of the primary wave. It's position vector IS AFTER the primary wave. It's basically interference of the ether particles beyond the primary wave when the primary wave hits the ether particles over there

  • @sumankalyantripathy7413
    @sumankalyantripathy7413 2 роки тому +1

    At 0:51, why is light shown as longitudinal waves, while it’s a transverse wave?

  • @The_Divert
    @The_Divert Рік тому

    Thanks for explaining this but what app are you using for drawing those?

  • @nikhil_IITK
    @nikhil_IITK 10 місяців тому

    Thank you sir what a good explanation

  • @vivekgupta3692
    @vivekgupta3692 4 роки тому +1

    100k congratulations

  • @YashpalSingh-mu4cp
    @YashpalSingh-mu4cp Рік тому

    Thanks a lot sir...😊

  • @Davil.gameing
    @Davil.gameing Місяць тому

    I luv ur voice sir😊😍

  • @sakthivignesh3877
    @sakthivignesh3877 2 роки тому

    God level explanation 💯💯

  • @marvhartigan3677
    @marvhartigan3677 4 роки тому +1

    Very nice. This guy is a gem , literally a fucking gem. Brilliant work my man.

  • @anitkumar8484
    @anitkumar8484 4 роки тому

    Best explanation ever in summary

  • @sashwatyo1293
    @sashwatyo1293 4 роки тому

    OMG WAVEFRONTS ASTOUND ME!!!!! 5:30 IS IMPECCABLE

  • @jatinbhatt7826
    @jatinbhatt7826 2 роки тому

    Sir, what software u use to create such an amazing animation?

  • @prabapraba3091
    @prabapraba3091 6 місяців тому

    U r awesome man

  • @irshadbaig9946
    @irshadbaig9946 3 роки тому

    Super explaination bro.

  • @arnabdas2416
    @arnabdas2416 11 місяців тому

    thank you, sir.

  • @samikshadongare9548
    @samikshadongare9548 Рік тому +1

    Well ..I wanted to try this but was too lazy to gather all the stuff .. .so I one day just partially closed my eyes, uk with my eyelashes right above my pupil and looked at a distant street light ( kind of replicating the small hole in the cardboard) ...I did actually see how the light rays kind of scatter ...if i look at that street light (which is actually a small bulb) with my eyes open its a different picture while its different with eyes almost closed

  • @smdjsound8972
    @smdjsound8972 12 днів тому

    Mast Maza Aaya....

  • @abdullahkhalid6090
    @abdullahkhalid6090 2 роки тому

    wow wow wow sir. thank u very much

  • @sandrasunny5885
    @sandrasunny5885 4 роки тому +1

    so what happens if it enter again a finite hole .it's gona be again curved or straight or mix...................

  • @sashwatyo1293
    @sashwatyo1293 4 роки тому +1

    Sir I did a project on FRACTALS........and THE CONCEPT OF SECONDARY WAVELETS FOLLOW that !! INFINITE AREA OF WAVEFRONTS!!!!!

    • @Sara_sami_0
      @Sara_sami_0 3 роки тому +1

      Wwoow i want to see that!

  • @boaz2453
    @boaz2453 2 роки тому

    Well Explained

  • @VishalKashyap-xv1kt
    @VishalKashyap-xv1kt 3 роки тому +2

    What happens in the case of a laser light Or a laser beam ? Why doesn't it spread?

    • @SriramV.-lq4ms
      @SriramV.-lq4ms 23 дні тому

      Low wavelength, big frequency and the pointers are built in such a way to avoid that

  • @AtiyakousarKousar
    @AtiyakousarKousar Рік тому

    Thi's is good ❤

  • @helaluddin182
    @helaluddin182 3 роки тому

    amazing....❤❤❤❤

  • @rank_ki_taiyari
    @rank_ki_taiyari 11 місяців тому

    I am thankfull

  • @sudheerv6941
    @sudheerv6941 11 місяців тому

    Can a common tangent be a curve?

  • @erenyeager6668
    @erenyeager6668 8 місяців тому

    I appreciate it

  • @_navamusic3054
    @_navamusic3054 2 роки тому +6

    Much better than PW nautankis... !!!

    • @pixyzz
      @pixyzz Місяць тому +1

      Fr dude I don't understand anything taught by pw 🙃

  • @vasupatel1567
    @vasupatel1567 2 роки тому

    Can it's drawback is related to Q.M
    Coz his and youngs slit experiment are starting points of Q.M

  • @firstjm9071
    @firstjm9071 3 роки тому

    Thank you !!!

  • @physicslab5787
    @physicslab5787 4 роки тому +1

    Nice

  • @charleszr853
    @charleszr853 Рік тому

    I dont get one thing, so when the plane wave came in from a source the edges didnt bend. But after going through slit, you included the round edge. But shouldnt that also apply to the wavefront before the slit since its also a finite wavefront?

    • @mumthas8870
      @mumthas8870 Рік тому

      It doesn’t bent cuz it not a finite plane ,

    • @charleszr853
      @charleszr853 Рік тому

      @@mumthas8870 but how is the wavefront that pass through the slit not a infinite wavefront? Its the exact same as the plane wave coming in but just shorter?

  • @Hemanthdev10
    @Hemanthdev10 Рік тому +1

    This is underrated fr

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      Hi , which college are you studying in ?? I am curently studing in 12th grade

    • @Hemanthdev10
      @Hemanthdev10 3 місяці тому

      @@vishalbalaji2007 which state are you frm?

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      @@Hemanthdev10 chennai bro

    • @Hemanthdev10
      @Hemanthdev10 3 місяці тому

      @@vishalbalaji2007 svce bro sriperumpudur

    • @vishalbalaji2007
      @vishalbalaji2007 3 місяці тому

      @@Hemanthdev10 bro thx for the response, I hv an other doubt , how much did you score in boards bro ??

  • @aridislam7554
    @aridislam7554 2 роки тому

    Thanks

  • @karthikchowdhari3094
    @karthikchowdhari3094 2 роки тому

    👍👍👍 thanks

  • @arya4532
    @arya4532 2 роки тому

    Thank you sir

  • @stripX31
    @stripX31 Рік тому +1

    Watching before 5hrs before exam

    • @BittuPatel-m6v
      @BittuPatel-m6v 6 місяців тому +1

      How was exam?😅

    • @stripX31
      @stripX31 6 місяців тому

      @@BittuPatel-m6v passed

  • @dreamskeepmeawake2959
    @dreamskeepmeawake2959 Рік тому

    Tysm

  • @Lakshyaverma777
    @Lakshyaverma777 4 роки тому

    Wow.......😍😍🥰🥰🤩🤩

  • @sathwikbandi5751
    @sathwikbandi5751 3 роки тому +1

    Sir u have shown a 2d wavefronts But I am unable to imagine 3d wavefronts.please can u create 3d wavefronts

  • @jasonzhou3152
    @jasonzhou3152 Місяць тому

    But why dont we have to curve around the wavelet of a plane wave as well
    That makes a curved wavefront

  • @ananyaupadhyay5821
    @ananyaupadhyay5821 Рік тому

    amazingggg

  • @siyaramsingh7915
    @siyaramsingh7915 4 роки тому +1

    🙏🙏🙏🙏🙏

  • @MemoMemo-ly2si
    @MemoMemo-ly2si Рік тому

    ❤❤❤

  • @amanamin3685
    @amanamin3685 2 роки тому +1

    Wait huygens principle only applies to light right?

  • @ryanizanami4866
    @ryanizanami4866 2 роки тому

    Yes.

  • @smdwivedi
    @smdwivedi 4 місяці тому

    You keep saying ether partical but it was a hypothesis which was later provided wrong

  • @hemanibijja2160
    @hemanibijja2160 8 місяців тому

    crazy

  • @saminakhatoon7693
    @saminakhatoon7693 5 місяців тому

    Tnakzxx

  • @NisarAhmad-em2nm
    @NisarAhmad-em2nm Рік тому

    Like❤❤❤

  • @IITB_Vikash
    @IITB_Vikash Рік тому

    But ether does not exist???

  • @valecter1789
    @valecter1789 2 місяці тому

    does huygens theory not work on lazers ?? 😂 It's always strange

  • @studentjoansalvadorlopezbo1836
    @studentjoansalvadorlopezbo1836 9 місяців тому

    El huygens ese tiene un morro que se lo pisa y no tiene ni idea

  • @broteendas1194
    @broteendas1194 3 роки тому

    The like dislike ratio says it all

  • @duggchi5277
    @duggchi5277 3 роки тому

    Brain

  • @nafistoki414
    @nafistoki414 Рік тому

    Regretting why I have hated this chapter. 😖

  • @aryangod2003
    @aryangod2003 4 місяці тому

    Of course there is no thing actually like Aether. Idea was abandoned at least since Michelson Morley experiments.