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White light is incident on one of the re...

White light is incident on one of the refracting surface of a prism of angle `5^@`. If refractive indices of red and blue colours are 1.641 and 1.659 respectively, the angular separation between these two colours when they emerge out of prism is.

A

`1.8^@`

B

`1.2^@`

C

`0.9^@`

D

`0.09^@`.

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