Monochromatic light through a triangular prism

Monochromatic light of wavelength $$600 \text{ nm}$$ strike an equilateral triangular prism with an angle of incidence $$\theta_i = 30^\circ.$$ The index of refraction for the prism is $$n=1.5.$$ What is the angle of refraction of the light as it leaves the prism rounded to the nearest degree?

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