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Two polarising sheets are placed with th...

Two polarising sheets are placed with their planes parallel, so that light intensity transmitted is max. Through what angle must either sheet be turned so that light intensity drops to half the maximum value ?

A

`60^(@), 120^(@)`

B

`45^(@), 135^(@)`

C

`30^(@), 150^(@)`

D

`0^(@), 180^(@)`

Text Solution

Verified by Experts

The correct Answer is:
D
`I = (I_(0))/(2) cos^(2) theta`
`(I_(0))/(2) cos^(2) theta :. cos^(2) = 1`
`theta = 0` or `180^(@)`
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