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Complete annihilation of light through polarizers

  1. Feb 13, 2012 #1
    Hi,

    when i am doing an experiment that uses two polarizers (Cross) to achieve complete annihilation of light,

    why am i not able to see complete darkness when i look at the light source from the end of the polarizers, but rather the light source changes to a different color

    for example, if i have a blue light source, i see it become dark blue, but never really black.

    so is there a reason? theoretically i am suppose to kill 100% of the light right?

    thanks!
     
  2. jcsd
  3. Feb 13, 2012 #2
    The polarizers are imperfect.
     
  4. Feb 13, 2012 #3
    so its a fault on the experiment apparatus?
     
  5. Feb 13, 2012 #4

    jtbell

    User Avatar

    Staff: Mentor

    Yes. Perfect polarizers are in the same category as frictionless surfaces.

    You might suggest to the Ideal Scientific Equipment Company that they add perfect polarizers to their catalog. :smile:
     
  6. Feb 13, 2012 #5
    haha ok thanks!
     
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