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A ray enters a glass sphere of refractiv...

A ray enters a glass sphere of refractive index`mu = sqrt3` at an angle of incidence of `60^@`, a ray is reflected and refracted at the farther surface of the sphere. The angle between the reflected and refracted rays at this surface is

A

`50^@`

B

`60^@`

C

`90^@`

D

`40^@`

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