Three polarizing filters are aligned such that light passes throughall three fil

Question

Three polarizing filters are aligned such that light passes throughall three filters. The polarization axes of the three filters makedifferent angles with the vertical, given by1 = 5°, 2 =50°, and3 = 65°, respectively (refer to FigureP24.59 in your textbook, on p. 821, for an image of theseangles). The incoming light is unpolarized, and has an intensity of10.00 W/m2.

a) Find the intensity of the light after it haspasses through all three filters.
1 W/m2

b) Find the direction of polarization for thelight after it has passed through the last filter. Give your answeras an angle from the vertical; your answer should be positive, andless than 180°.
2°

Explanation / Answer

you need to use Malu's Law I=Iocos2(), since the ligth isunpolarized,Io= the given intensity (10)/2, and will be the angle between the filters... Ifirst = I before passingtru the filter * (1/2) I second = I firstcos2(2 - 1) I final = I secondcos2(3 - 2)

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