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An unpolarised beam of intensity I0 is i...

An unpolarised beam of intensity `I_0` is incident on a polariser and analyser placed in contact. The angle between the transmission axes of the polariser and analyser is `theta`. What is the intensity of the light emerging out of the analyser ?

A

`I_0`

B

`I_0 cos theta`

C

`I_0 cos^2 theta`

D

`(I_0 cos^2theta)/2`

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