Two polaroid A and B are kept with their...

Two polaroid A and B are kept with theirtransmission axes at an angle `theta` with respect to one another. If the transmitted intensity of light `I_1 = 0.75 I_0` where `I_0` is the intensity of light incident on the system then `theta` is

A

`30^@`

B

`45^@`

C

`60^@`

D

`90^@`.

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