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Amplitude will change after unpolarised wave passes through a polariod

  1. Sep 16, 2010 #1
    Can i know whether the amplitude will change after unpolarised wave passes through a polariod?
     
  2. jcsd
  3. Sep 16, 2010 #2
    Re: polarisation

    I don't think so..try reading here...I skimmed but did not see a clear cut answer.

    http://en.wikipedia.org/wiki/Polarized_light

    Under polarization effects in everyday life I found :

    which sounds like amplitude reduction ????
     
  4. Sep 16, 2010 #3
    Re: polarisation

    You can't know that unless you know the polarization of the light before it reaches the polaroid filter, so you either need to know the polarization of your light source, or pass it through a known polarizing filter beforehand.
     
  5. Sep 16, 2010 #4
    Re: polarisation

    If you know for a fact that the light is unpolarized, its amplitude will definitely decrease as it passes through a polarizer.
     
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