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Unpolarised light falls on two polarizin...

Unpolarised light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam?

A

`75^(@)`

B

`55^(@)`

C

`35^(@)`

D

`15^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`I= (I_(0))/(2) cos^(2)theta`
`implies (I_(0))/(6)= (I_(0))/(2) cos^(2)theta implies costheta=(1)/(sqrt(3)) implies theta= 55^(@)`
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