A ray of light enters an equilateral prism made of material with n=1.45 at angle of emergence theta. The internally refracted ray is parallel to the base of the prism. What is the angle of refraction for the ray leaving the prism?

A 46.5

B 30.0

C 20.2

D 15.7

I know we have to use some form of snell's law here but I don't know how to start when there is no angle of incidence given. Any help would be appreciated.

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we have the angle of refraction as the prism is equivalent and beam ... View the full answer