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Q.

A beam of natural light falls on a system of 6 polaroids, which are arranged in succession such that each polaroid is turned through 300 with respect to the preceding one. The percentage of incident intensity that passes through the system will be

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a

100%

b

50%

c

30%

d

12%

answer is D.

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Detailed Solution

If I is the final intensity and I0 is the initial intensity thenI=I02cos230∘5 or II0=12×3210=0.12
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