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A beam of natural light falls on a system of 5 polaroids, which are arranged in succession such that the pass axis of each polaroid is turned through  with respect to the preceding one. The fraction of the incident light intensity that passes through the system is

a)

b)

c)

d)



Question ID - 150213 | SaraNextGen Top Answer

A beam of natural light falls on a system of 5 polaroids, which are arranged in succession such that the pass axis of each polaroid is turned through  with respect to the preceding one. The fraction of the incident light intensity that passes through the system is

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (d) -

(d)

Let  be the intensity of incident light

Then the intensity of light from the  polaroid is

Intensity of light from the 2nd polaroid is

Intensity of light from the 3rd polaroid is

Intensity of light from the 4th polaroid is

Intensity of light from the 5th polaroid is

Therefore, the fraction of the incident light that passes through the system is

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