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A ray of light is incident at an angle o...

A ray of light is incident at an angle of `60^@` on the face of a prism having refracting angle `30^@.` The ray emerging out of the prism makes an angle `30^@` with the incident ray. Show that the emergent ray is perpendicular to the face through which it emerges and calculate the refractive index of the material of prism.

A

`(sqrt(5))/(2)`

B

`(sqrt(5))/(sqrt(2))`

C

`(2sqrt(5))/(3)`

D

`(4)/(3)`

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The correct Answer is:
A
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