# The Benzene Prism from the IPhOO

A right-triangulated prism made of benzene sits on a table. The hypotenuse makes an angle of $$30^\circ$$ with the horizontal table. An incoming ray of light hits the hypotenuse horizontally, and leaves the prism from the vertical leg at an acute angle of $$\gamma$$ with respect to the vertical leg. Find $$\gamma$$, in degrees, to the nearest integer. The index of refraction of benzene is $$1.50$$.

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