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The angle of incidence for a ray of li...

The angle of incidence for a ray of light of a refracting surface of at prism is `45^@`. The angle of prism is `60^@`. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are

A

`30^@,1/sqrt2`

B

`45^@,1/sqrt2`

C

`30^@,sqrt2`

D

`45^@,sqrt2`

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