Two polaroids are kept crossed to each other. Now one of them is rotated through an angle of 45°. The percentage of incident light now transmitted through the system is :
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a
15%
b
25%
c
50%
d
60%
answer is C.
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Detailed Solution
I=I0cos2θ when θ=900I=0aWhen θ=450I=I0cos245=I02=50%
Two polaroids are kept crossed to each other. Now one of them is rotated through an angle of 45°. The percentage of incident light now transmitted through the system is :