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Polarization: ratio of transmitted to incident intensity

  1. Jul 16, 2013 #1
    1. The problem statement, all variables and given/known data

    A beam of unpolarized light is incident on a series of three polarizers as shown. The angle of the transmission axis of each polarizer is indicated by the dashed line, with q1 = 110, q2 =230, and q3 = 370 (all defined relative to vertical). What is the ratio of the transmitted intensity to the incident intensity?


    2. Relevant equations

    Malus' law S=S0cos2θ

    3. The attempt at a solution

    S/S0=cos2θ

    θ=11°+23°+37°=71°

    S/S0=cos2(71)=0.11
     
  2. jcsd
  3. Jul 17, 2013 #2

    rude man

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    After passing thru the first polarizer, what is the angle and intensity? Then, after passing thru the second polarizer, what is the angle and intensity? Finally, after passing thru the third polarizer, what is the angle and intensity?
     
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