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The refracting angle of a prism is A and...

The refracting angle of a prism is A and the refractive index of its material is cot `A//2`.For a ray of light incident on the prism,find the angle of minimum deviation in terms of A.

A

`180^@-3A`

B

`180^@+2A`

C

`90^@-A`

D

`180^@-2A`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
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