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Unpolarised light of intensity I0 passes...

Unpolarised light of intensity `I_0` passes through five successive polaroid sheets,each of whose transmission axes makes an angle `45^@`. With the previous one.The intensity of the finally transmitted light is

A

`(I_(0))/(8)`

B

`(I_(0))/(4)`

C

`(I_(0))/(2)`

D

`(I_(0))/(sqrt2)`

Text Solution

Verified by Experts

The correct Answer is:
B
The intensity of the light after passing through the first Polarised `= (I_(0))/(2)`. Now, the intensity of the light after getting passed through the second Polaroid will be
`I = (I_(0))/(2) cos^(2) theta`
`= (I_(0))/(2)cos^(2) 45^(@) = (I_(0))/(4)`
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