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A beam of ordinary light is incident on ...

A beam of ordinary light is incident on a system of four polaroids which are arranged in succession such that each polaroid is turned through `30^(@)` with respect to the preceding one. The percentage of the incident intensity that emerges out from the system is appromately

A

`56%`

B

`6.25%`

C

`21%`

D

`14%`

Text Solution

Verified by Experts

The correct Answer is:
C
`I = (I_(0))/(2) (cos^(2) theta)^(n-1) ` where n = number of polaroids
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