Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

When a light is polarized,what happens to its magnetic field?

  1. Sep 14, 2005 #1
    When a light is polarized,what happens to its magnetic field?
    Also what is light.How it is produced? :confused:
     
  2. jcsd
  3. Sep 14, 2005 #2

    Chi Meson

    User Avatar
    Science Advisor
    Homework Helper

    When unpolarized light goes through a polarizing filter, half of the lights energy is absorbed by the filter (that's the idealized short story). The outcoming light's electric field "oscillates" along one transverse axis. The light's magnetic field still oscillates along along an axis perpedicular to the electric field.

    The "picket fence analogy" is usually to blame for this. Polarization of light is not due to light squeezing through tiny gaps in the substance.
     
    Last edited: Sep 14, 2005
  4. Sep 14, 2005 #3

    Claude Bile

    User Avatar
    Science Advisor

    Light is an electromagnetic wave, which is a disturbance in an electromagnetic field that propagates at a fixed speed.

    Most of the light we observe is due to black body radiation, fluroescence can be put down to spontaneous emission, whereas lasers generate light via stimulated emission.

    Claude.
     
  5. Sep 15, 2005 #4
     
  6. Sep 19, 2005 #5

    Claude Bile

    User Avatar
    Science Advisor

    The flow is discontinuous. The discontinuous flow manifests itself as quantum noise when attempting to detect weak light sources.

    Claude.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: When a light is polarized,what happens to its magnetic field?
Loading...