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## Homework Statement

A ray of light falls on the surface AC of a prism with a straight angle and with two sides equal. For which incidence angle the ray won't come out of the surface AB. The index of refraction for the prism is n=2.

## Homework Equations

sina/sinb=n2/n1

## The Attempt at a Solution

sinb=1 so sina=n2/n1=1/2 the angle is pi/6 rad. Am I right?