light beams from two sources are directed at a polarizer. one of the sources con

Question

light beams from two sources are directed at a polarizer. one of the sources consitsts of unpolarized light, while the other consists of polarized light. The polarizer's axis is tilted 37 degrees relative to the polarization direction of the polarized beam. Both the polarized and unpolarized beam have an intensity of 12 watts/meter^2.
A) Sketch
B)calculate the aggregate amplitude just past the polarizer.
c)at what angle relative to the first axis, shuld a second polarizer be oriented in order that the amplitude exiting it is just 10% of what entered.
d) repeat part c for exiting intensity dropping to 10%

Explanation / Answer

B) Intensity due to unpolarised light = 12/2 = 6
Due to polarised light = 12*cos^2(37) -> Malus law
Net I = 13.6538 W/m^2

C) From malus law, I = Iocos^2(theta)
cos^2(theta) = 0.1
theta = 71.565 deg

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