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Polarization of light

  1. Apr 24, 2013 #1
    1. The problem statement, all variables and given/known data

    Three polarizing filters are stacked, with the polarizing axis of the second and third filters at 23.0° and 62.0°, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 75.0 W/cm^2 after it passes through the stack. If the incident intensity is kept constant, what is the intensity of the light after it has passed through the stack if the second polarizer is removed?

    2. Relevant equations
    I=Imaxcos2(θ)


    3. The attempt at a solution

    I don't understand what the question is asking. Is the light passing through multiple times? And if it is, wouldn't it just be 75(cos262°)?
     
  2. jcsd
  3. Apr 24, 2013 #2

    rl.bhat

    User Avatar
    Homework Helper

    When the light reaches the third filter, intensity of the light is not 75 W/cm^2.
     
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