Optics Question 185

Question: A beam of natural light falls on a system of 6 polaroids, which are arranged in succession such that each polaroid is turned through 30° with respect to the preceding one. The percentage of incident intensity that passes through the system will be

Options:

A) 100%

B) 50%

C) 30%

D) 12%

Show Answer

Answer:

Correct Answer: D

Solution:

If I is the final intensity and I0 is the initial intensity then

I=I02(cos230)5

or II0=12×(32)10=0.12



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