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Fraction Of The Intensity Incident

  1. Apr 24, 2006 #1
    Two Polaroid filters are initially crossed. The analyzer is rotated through an angle of 55.0 degrees. Find the fraction of the intensity incident on the polarizer which passes the analyzer.

    I used
    I1=1/2 Io
    I2= I1cos
    I2= 1/2 Io cos^2(theta)
    = 1/2 Io cos227.5°
    = .393 Io

    Is this correct or should the angle be 55 degrees??
  2. jcsd
  3. Apr 24, 2006 #2
    Just want to know if anyone has an idea if this is correct?
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