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Polaroid sheets and the law of malus

  1. May 12, 2012 #1
    Unpolarised light passes through two Polaroid sheets. The axis of the rst is horizontal, and
    that of the second is 50 above the?

    Do i have this right. I am using law of malus I=I0 cos2θ

    Im getting 47% but i dont know if thats right. If someone could help that would be awesome thanks.
     
  2. jcsd
  3. May 12, 2012 #2

    tiny-tim

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    hi cuddlylover! :smile:
    how did you get 47% ?
     
  4. May 12, 2012 #3
    (cos(50)^2)/2

    Is that not right?
     
  5. May 12, 2012 #4

    tiny-tim

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    he he :biggrin:

    press the "degrees" button! :wink:
     
  6. May 12, 2012 #5
    28%????
     
  7. May 12, 2012 #6

    tiny-tim

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    now you've completely lost me :redface:

    how did you get 28% ? :confused:
     
  8. May 12, 2012 #7
    Me to lol i get the feeling that was not my degrees button i just hit :)
     
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