Polarization of light, linear and circular | Light waves | Physics | Khan Academy

Поделиться
HTML-код
  • Опубликовано: 6 июл 2014
  • This is the underlying physics behind 3D glasses. Created by David SantoPietro.
    Watch the next lesson: www.khanacademy.org/science/p...
    Missed the previous lesson? www.khanacademy.org/science/p...
    Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.
    About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
    For free. For everyone. Forever. #YouCanLearnAnything
    Subscribe to Khan Academy’s Physics channel: / channel
    Subscribe to Khan Academy: ruclips.net/user/subscription_...

Комментарии • 391

  • @dumitruene8883
    @dumitruene8883 5 лет назад +771

    That drawing of the perpendicular magnetic fields was amazing.

    • @Cosmuex
      @Cosmuex 4 года назад +19

      I came to the comments to see if anyone else felt that way. I was amazed

    • @shreenidhhi8633
      @shreenidhhi8633 3 года назад +13

      ikr, it was so satisfying for some reason

    • @moizmansoorally1450
      @moizmansoorally1450 2 года назад +6

      Yh why aren't more people talking about it

    • @Marius1708
      @Marius1708 Год назад +2

      I even tried it myself because it felt so easy and satisfying

    • @monkcherry4497
      @monkcherry4497 Год назад

      @@Marius1708 what soft ware is it

  • @antonpolishch
    @antonpolishch 5 лет назад +107

    4:52"...sun is shining and it is a beauuuutifullll day")))) here, at my computer I feel your enthusiasm

  • @Wayk123
    @Wayk123 5 лет назад +28

    2:20 "This thing's hot!" I laughed way too hard.

  • @yxxx2790
    @yxxx2790 2 года назад +33

    i don’t even take physics but came across the concept of polarization and was intrigued by it and decided to search some videos up. u did a great job at explaining it even for a non physics student. great job!!

  • @thepinkcodon
    @thepinkcodon 6 лет назад +78

    I've never experienced a better explanation of polarization. Thanks a ton! This is gold :P Also, I loved the movie theater example.

  • @racheli4365
    @racheli4365 4 года назад +28

    Just tried to understand this for about an hour, but you made this perfectly clear in less than 4 minutes. Thanks!

  • @kaden9572
    @kaden9572 2 года назад +11

    Man, been reading a textbook for a week and couldn't grasp this... Your drawings REALLY came in handy, THANK YOU

  • @yoshicat123
    @yoshicat123 8 лет назад +115

    Thank you for explaining. I'm a masters student and I feel like I understand polarization more than I ever have before lol

    • @joewang4962
      @joewang4962 2 года назад +1

      Not until u know about the Poincare sphere(corresponds to the Bloch sphere in quantum information science! ) and the rigorous definition of polarization😏

    • @paulchen355
      @paulchen355 2 года назад +3

      @@joewang4962 bro, I just need to pass the class. LMAO

  • @April-nj8th
    @April-nj8th 4 года назад +11

    Loved it it feels so good to just know stuff without te pressure of having to mug it up and write it for tests....this feels the right way of studying

  • @outdothyself5745
    @outdothyself5745 5 лет назад +7

    After doing a lot of survey , i finally got something actually qualitative and worthy . Thanks 👍👍

  • @socialreveluv5428
    @socialreveluv5428 2 года назад

    Thank you for all the examples and explanations. It was really helpful that you always questioned "why are we doing this?" and answered it right away, phenomenal.

  • @Stringfellow-xo6do
    @Stringfellow-xo6do 7 месяцев назад +1

    Wow, I've been trying to find a way of explaining Polarisation regarding fibre optic transmission and multiplexing and this has helped massively.

  • @gailbarlow8958
    @gailbarlow8958 6 лет назад

    Brilliant! At last someone has got it through to my brain....... struggled with this for AGES. Thank you very much.

  • @shekharsrivastava5535
    @shekharsrivastava5535 9 лет назад +11

    U explained really v well, u r definitely a very good teacher.

  • @robrigole1402
    @robrigole1402 4 года назад

    Easiest explanation to understand out of all the many textbooks I have read. Thanks!

  • @haydenroams
    @haydenroams 2 года назад +1

    70 percent of people watching this video didn’t come here because of one quiz question in a class, they came here out of genuine curiosity about how the world works. These are the people you should be employing.

  • @Introvertrains
    @Introvertrains 3 года назад +2

    I came here for a visual understanding of an RCP wave
    Really satisfying
    Thanks

  • @mazzinez.f.6071
    @mazzinez.f.6071 4 года назад +15

    As an IB student struggling in HL physics, this helps so much. Definitely going to do Kahn with IB to help me through.

    • @PatchiooInc
      @PatchiooInc 2 года назад

      damn i am doing the same for HL Physics lol

  • @tumblevveed3586
    @tumblevveed3586 Год назад +7

    First time I experienced polarised glasses was actually on the lake fishing with my dad. The sun was out, and the glare off the lake was brutal. I was wondering how my dad was trolling the boat around the stumps in the a cove on the lake that I couldn’t hardly see. At one point he gave me his shades and bam, it was a huge difference. I didn’t get to keep them on long as he wanted them back so he could continue avoiding the tree stumps.
    Well, I got my first set of polarised shades at the tackle shop dad bought me and those new shades have been sitting at the bottom of that lake for 30 years now as when I bent over the boat to get a fish netted, they fell off.

    • @Gretephoto
      @Gretephoto 2 месяца назад

      Aw, great story!!

  • @bronagab9181
    @bronagab9181 2 года назад +1

    Fantastic explanation. Both, colloquially and with your drawing skills. Thank you!

  • @seamusfing
    @seamusfing 5 лет назад

    this explanation was incredible! thank you so much for taking your time making this video

  • @ashar4121
    @ashar4121 Год назад +1

    This is more exciting than I thought. Great explanation!

  • @radioactivesiddique6568
    @radioactivesiddique6568 Год назад

    best ever.....i'll share with my all classmates who are going through the same problem

  • @elizabethelizabethhh
    @elizabethelizabethhh 5 лет назад

    this was an excellent explanation thank you so much!! feeling happy i understand what polarisation is now!

  • @alirezafarhadizadeh5674
    @alirezafarhadizadeh5674 4 года назад +1

    That was superb, thank you very much for this movie and excellent explanation with simple graphics but hugely informative.

  • @benbruno8471
    @benbruno8471 9 лет назад

    thanks! great video. Really helped me understand what is going on in CD experiments

  • @shamiliqbal2979
    @shamiliqbal2979 4 месяца назад

    This is awesome... I've been working with retarder material and this helps me understand the concept of polarisation even more. I on behalf of viewers from years 2024, Thank you very much.

  • @xinyiwang9461
    @xinyiwang9461 5 лет назад

    That helps a lot! Thank you so much! Your explanation was so clear.

  • @gauravnegi4312
    @gauravnegi4312 Год назад

    BEST EXPLANATION VIDEO, so simple and clear.

  • @husseinsaleh9166
    @husseinsaleh9166 Месяц назад

    that was very educative, thank you. keep up the good work

  • @annyni6640
    @annyni6640 2 года назад

    I am so lost currently in my laser and photonics class and this definitely helped a lot

  • @navitajain2423
    @navitajain2423 9 лет назад +4

    Awesome ! Thanks Khan academy for making such brilliant videos.

  • @kubabooth6346
    @kubabooth6346 2 года назад

    Literally a saviour!
    Thank you for your clear and precise explanations

  • @challengepoker
    @challengepoker 9 лет назад +1

    Excellent explanations ! Thanks !

  • @sheriek4484
    @sheriek4484 6 лет назад

    Thank you for posting this - you are a most excellent teacher!!!

  • @clearbrain
    @clearbrain 7 лет назад +1

    beautiful explanation...thanks for sharing knowledge

  • @torebektoregozhin5675
    @torebektoregozhin5675 3 года назад

    It is the best explanation I ve ever heard and seen. Both informative and interesting

  • @alaska3333
    @alaska3333 8 лет назад +1

    Excellent presentation. Easy to understand, my compliments.

  • @yurcchello
    @yurcchello 7 месяцев назад

    simple but great explanation of circular polarization. that what i was looking for

  • @FeNniXX3
    @FeNniXX3 6 лет назад

    Wow.. What an awesome explanation! Thank you.

  • @musabmelhem7976
    @musabmelhem7976 2 года назад

    such a beautiful explanation.
    thank you so much for your help!

  • @marcelinemoran5029
    @marcelinemoran5029 7 месяцев назад

    I am watching you from iraq this was Amazing! Thank you so much ❤

  • @1.4142
    @1.4142 3 года назад +2

    Didn't realize 3D glasses worked like that

  • @Hkme89
    @Hkme89 8 месяцев назад

    Amazing explanation. Thank you 🌹

  • @valvhin
    @valvhin 7 лет назад +1

    wow thanks dude ! thats what I needed to see

  • @littlemoreinformative4194
    @littlemoreinformative4194 7 лет назад

    first time i came to know what is polarization. great video

  • @treasurearhewoh327
    @treasurearhewoh327 3 года назад

    OMG polarization simplified, thank you so much, 2021 anyone?

  • @mahendrachozhan2739
    @mahendrachozhan2739 9 лет назад +1

    A Nice explanation. Thank you..

  • @A-TrainForReal
    @A-TrainForReal Месяц назад +1

    Phase,Twilight,eyes of wisdow,nine ropes,polarized light,crow and declaration between front and back hollow PURPLE

  • @ledju
    @ledju 7 лет назад +2

    Thanks I totally understood polarization now, it was so messy in my brain :)

  • @k.zinhtut7668
    @k.zinhtut7668 4 года назад +3

    Can you also explain with equations? Like matrix calculations. Thanks a lot! :) Your video is awesome!

  • @Mic679
    @Mic679 6 лет назад

    Extremely informative. Thank u sir.

  • @AoyamaIchome
    @AoyamaIchome 2 года назад

    Amazing video on polarization, thank you so much !

  • @krish2nasa
    @krish2nasa 7 лет назад

    Excellent explanation, thank you very much!

  • @greasygoblin3541
    @greasygoblin3541 8 лет назад

    Great explanation! Very clear!

  • @indrashispowali
    @indrashispowali Год назад

    lovely... thanks for such an amazing explanation!

  • @stalin4timetravel376
    @stalin4timetravel376 7 лет назад +2

    When I was little I always noticed how if I tilted my head far enough the image in the 3D movie got all funky. Now I know why!

  • @zaynabayman8904
    @zaynabayman8904 3 года назад +1

    Thank you so much finally I understand what is polarization:)

  • @sarujanrupan4831
    @sarujanrupan4831 3 года назад

    The cinema example was mind blowing thanks!

  • @eikkaheikkinen
    @eikkaheikkinen 9 лет назад +3

    great explanation.. even i understood ;D

  • @SUPERSONIC88-
    @SUPERSONIC88- 5 лет назад

    No fantasy animation, just simply and easy to understand ,thanks

  • @csaa7659
    @csaa7659 7 лет назад +1

    great presentation, appreciate it

  • @fawazsyed7883
    @fawazsyed7883 3 года назад

    Awesome explanation of light polarization!

  • @nalison3933
    @nalison3933 8 лет назад

    such a good presentation thank you so much!!!

  • @apearson79
    @apearson79 2 года назад +1

    This guy can explain in twenty minutes what takes my prof two hours 😂

  • @mohammadreza1288
    @mohammadreza1288 2 года назад

    this was great, thank you

  • @ashwinikumar5530
    @ashwinikumar5530 8 лет назад +2

    Thanks for the video. Thank you sir.

  • @alantomat4492
    @alantomat4492 7 лет назад +1

    man you saved my life. thank you bro

  • @MradanshuDayal
    @MradanshuDayal 2 года назад

    thank you sir the movie theatre example was soo good!!! I feel so glad that I know it now. thank you sir, I loved the explanation..

  • @user-qf3ud4vs1e
    @user-qf3ud4vs1e 6 лет назад

    Thank you so much , I was so confused until I saw the video

  • @Spear8
    @Spear8 Год назад

    dude physics is everywhere !!

  • @aromals2403
    @aromals2403 8 лет назад

    great video... really helped me ....thanksss

  • @VINCENTDARKLY
    @VINCENTDARKLY 10 лет назад +1

    Damn good explanation. Thanks.

  • @AA-nh5wo
    @AA-nh5wo 8 лет назад

    wow...that's amazing, thanks

  • @srdoberman
    @srdoberman 4 года назад

    Most clear thanks for the glasses

  • @nurasarun
    @nurasarun 8 лет назад +1

    Thank you for posting !

  • @NVNgamer
    @NVNgamer 2 месяца назад +1

    Beautiful explanation ✨

  • @Aikisbest
    @Aikisbest 7 лет назад

    Aha, now I'm starting to understand how the 3d on the 3ds works. Looking at the 3ds screen with my polarized sunglasses and slowly rotating it produced the same "colour/brightness filter" as when doing the double/triple polarized lenses experiment that there are loads of video examples of here on YT. Amazing what one can learn with an accessory, some basic explanations, and a curious/investigative mindset. My day has been made!

    • @Aikisbest
      @Aikisbest 7 лет назад

      EDIT: I feel like im missing something though...

  • @devanshgandhi1276
    @devanshgandhi1276 8 лет назад

    Amazing. Lovely video!

  • @dalethebelldiver7740
    @dalethebelldiver7740 7 лет назад

    Very good; now I want to know how this is accomplished.

  • @Apollyon1111
    @Apollyon1111 6 лет назад +1

    One question that I cannot find asked anywhere: Is there an ideal rotation of a circular polarizer camera lens? If so, could I find that point and mark the bezel and just turn it to that every time?

  • @rosariopereira8857
    @rosariopereira8857 5 лет назад

    Thanks, helped me a lot. Cleared a doubt

  • @MohdNadeem-zf4yu
    @MohdNadeem-zf4yu 6 лет назад

    Keep it up sir please make more videos this is very important and useful for us

  • @romanlastname4133
    @romanlastname4133 7 лет назад +1

    That was beautiful.

  • @azubuikegodswill1856
    @azubuikegodswill1856 Год назад

    thanks, great explanation

  • @douglasdanieldecarvalho18
    @douglasdanieldecarvalho18 3 года назад

    Thanks for the video!

  • @ESEben10
    @ESEben10 2 года назад

    nice explanation! as far as I understood, to get the circular polarization we must have a phase offset between the E and H components, right?

  • @richiestaccordi
    @richiestaccordi 7 лет назад

    Dude, this video is great, thanks!

  • @pranaymanchanda1274
    @pranaymanchanda1274 5 лет назад

    GREAT JOB KHAN ACADEMY !

  • @turdakhov
    @turdakhov 4 года назад

    Great! Thanks!!!

  • @AK-wo3uw
    @AK-wo3uw 2 года назад +1

    As per wave particle duality can electron behaving like wave can show polarization and how?

  • @samiramammadova4942
    @samiramammadova4942 8 лет назад

    thank you verey much it helped me ! great

  • @SoMuchBullShit1
    @SoMuchBullShit1 6 лет назад

    amazing video! very informative

  • @TheSamaa1997
    @TheSamaa1997 9 лет назад +1

    Thank you man! 😊

  • @gamingwithsinglevicky7458
    @gamingwithsinglevicky7458 7 месяцев назад

    It helps me a lot thank you

  • @jmcgarrahan1
    @jmcgarrahan1 5 лет назад

    This was fantastic!

  • @dangvunam
    @dangvunam 2 года назад

    this is awesome!

  • @1987monzi
    @1987monzi 8 лет назад

    great video, it helped!!

  • @janveenhuis4355
    @janveenhuis4355 Год назад

    Great explaination

  • @SagaramM
    @SagaramM 2 года назад

    Thank you for such a lucid explanation.