Introduction to polarization of light, polarizing filters, polarization by reflection and scattering

Поділитися
Вставка
  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 28

  • @michaellovejoy8751
    @michaellovejoy8751 3 роки тому +17

    First video I found that actually explains the mechanism (ie. in the context of oscillating dipoles). Makes total sense!

    • @ZaksLab
      @ZaksLab  3 роки тому +1

      Thanks! - Zak

  • @kunalsadana6131
    @kunalsadana6131 2 роки тому +4

    Such a beautiful explanation. First video where it is clearly mentioned about oscillating dipoles and how that influences the vibration of light particles.

    • @ZaksLab
      @ZaksLab  2 роки тому +1

      Thank you! -- Zak

  • @how-about-no_56
    @how-about-no_56 8 місяців тому +1

    I studied this a month ago and forgot the explanation our professor gave. This is the only video that explains the mechanism behind it. Thanks for making this video.
    Love from Bharat

    • @ZaksLab
      @ZaksLab  8 місяців тому

      glad I could help! z

  • @6l816
    @6l816 Рік тому +2

    3:43 "molecules at the point of contact are oscillating back and force with this orientation"
    Why that orientation and not others?

    • @ZaksLab
      @ZaksLab  Рік тому

      Both components are there - in and out of the page, and the other component that I highlighted. Linear combinations of these two components give you all possible orientations of electric field perpendicular to the direction of motion (light is a transverse wave). Then the point is that the component shown in the page cannot radiate in the direction of oscillation, so that component is killed off, leaving only the "in and out of the page component". Hope this helps. z

  • @parsoakhorsandmusic
    @parsoakhorsandmusic 5 місяців тому +1

    Great video. Thanks!

    • @ZaksLab
      @ZaksLab  5 місяців тому

      you're welcome! z

  • @levmilarlpvp
    @levmilarlpvp 2 роки тому +1

    Can someone explain why the reflection off of a vertical surface results in vertical polarization? You can turn the picture 90° and then you will be left with the horizontally oscillating part (the part that goes into the plane), so nothing should change. ?

    • @levmilarlpvp
      @levmilarlpvp 2 роки тому +1

      ok I got it, it will be vertically polarized if the light comes from the side (if it is parallel to the horizon). If it comes from the top, it will be horizontally polarized

  • @HabibUrRahman-sr2wn
    @HabibUrRahman-sr2wn 2 роки тому

    One thing which is confusing is what exactly you mean by vertical polarization and horizontal polarization
    Is it something to do with these dots and arrows?
    Or do you mean to say that every point in reflected ray has horizontal and vertical component with one being on the surface of glass and other vertical respectively?

    • @ZaksLab
      @ZaksLab  2 роки тому

      dot = component of polarization oscillating perpendicular to the page, arrow = component of polarization oscillating in the plane of the page, and both components of polarization oscillate perpendicular to the direction of the ray propagation

  • @GuitarJ111
    @GuitarJ111 2 роки тому

    Dude amazing video, great thorough explanation

    • @ZaksLab
      @ZaksLab  2 роки тому

      Thanks! -- Zak

  • @nowthenad3286
    @nowthenad3286 Рік тому

    When I have seen other people explaining this they draw lines on the polarization material that are parallel with the polarization axis. Why have you drawn it differently?

    • @ZaksLab
      @ZaksLab  Рік тому +1

      I see -- you were refering to the polarizing film! Yeah, the actual physical chains of molecules are responsible for killing off E field because of currents that run parallel through those chains. So those lines represent the actual chains of molecules and the surviving light is *perpendicular* to that axis. In many diagrams, they just show lines in the direction of polarization as if the waves are passing through slots in a picket fence, but those lines are actually perpendicular to the molecular structure in the film! Maybe it's a useful tool for visualization, but it causes confusion about what's actually going on at the micro level, which is essentially the opposite of the typical diagram. One polarization is killed off precisely because we have conductive chains whose electrons can respond to the E field in that direction; i.e., the direction in which electrons can actually move is the direction in which energy is absorbed and the polarization is killed off. z

    • @nowthenad3286
      @nowthenad3286 Рік тому

      @@ZaksLab Thank you very much for taking the time to reply. A very clear explanation as well.

    • @ZaksLab
      @ZaksLab  Рік тому +1

      @@nowthenad3286 you're welcome! z

  • @klevisimeri607
    @klevisimeri607 3 роки тому

    Beautiful! Amazing Job!

    • @ZaksLab
      @ZaksLab  3 роки тому

      Thanks! -- Zak

  • @herbertauer434
    @herbertauer434 3 роки тому

    When light gets reflected at the Brewer´s angle, it gets polarized. What does happen to the part the enters glass or water? Does it get enriched for the other direction(s)?

    • @ZaksLab
      @ZaksLab  3 роки тому

      Really good question! With the horizontal polarization reflected off the surface, the percent horizontal in the refracted ray is reduced relative to the vertical polarization, since all the vertical polarization is refracted. It's one thing I forgot to get into the diagram (normally illustrated by showing half as many dots in the refracted ray for example). -- Zak

  • @christianjourneytv1003
    @christianjourneytv1003 10 місяців тому +1

    Thanks.

    • @ZaksLab
      @ZaksLab  10 місяців тому

      You're welcome!

  • @II-th7bn
    @II-th7bn 3 роки тому

    Keep it up 👍👍 ❤️ from India

    • @ZaksLab
      @ZaksLab  3 роки тому

      Thanks! -- Zak