Two polarizing sheets have their transmission axes parallel sothat the intensity

Question

Two polarizing sheets have their transmission axes parallel sothat the intensity of unpolarized light transmitted through both ofthem is a maximum. Through what angle must either sheet be rotatedif the transmitted intensity is 25 % of the incidentintensity?

a. 30°
b. 15°
c. 60°
d. 45°
e. 75° Two polarizing sheets have their transmission axes parallel sothat the intensity of unpolarized light transmitted through both ofthem is a maximum. Through what angle must either sheet be rotatedif the transmitted intensity is 25 % of the incidentintensity? 30° 15° 60° 45° 75°

Explanation / Answer

I=Iocos2 I/Io=1/4=0.25 hence cos=60degree hence either sheet be rotated by an angle of 30 degree so option A is correct.

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