2.) Consider the above arrangement of visible lightpolarizers. ii) Suppose polar

Question

2.) Consider the above arrangement of visible lightpolarizers.

ii) Suppose polarizers A and C are orientedparallel to each other and polarizer B (now in place) isat 45° to both. Then what fraction ofthe initially unpolarized light incident on Apasses through C?
3%

iii) Keep in mind that if polarizers A and Care oriented at 90° to each other (and polarizer B isabsent) no light at all gets through. Then if polarizer Bis inserted and aligned at 45° toA, the fraction of initially unpolarized lightlight incident on A that passes through C isnow
4%

iv) Answer Prediction 2-4 and write the result in yourworkbook and enter it here:
5°

Explanation / Answer

Malus' Law   I = I0 cos2     where is the orientation ofthe polarizers I0 = 1/2 the intensity of the unpolarized light(the light transmitted by polarizer A) 2-i)   I = .5 * cos2 70 = .058 2-ii & 2-iii) must be the same Light transmitted by B    I = .5 cos2 45 = .25 Light transmitted by C I = .25 cos2 45 = .0125 In each case B is at 45 deg to polarizer C

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