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Two polaroids are kept crossed to each o...

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

A

`15%`

B

`25%`

C

`50%`

D

`60%`

Text Solution

Verified by Experts

The correct Answer is:
B
`I_(1)=(I_(0))/(2),I_(2)=I_(1)cos^(2)phi=(I_(0))/(2)xxcos^(2)45^(@)=(I_(0))/(4)=0.25I_(0)`
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