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1. A light ray enters a rectangular prism. a. (10 points) If the angle of incidence is 60.0 and the A HIR angle of refraction where the light ray exits the prism is 75.0', what is the index of refraction of the glass? e - 750 {See diagram at right. Angles are approximate.} glass n unknown b. (10 points) For total internal reflection, for the ray to not exit the glass at the second glass/air interface, what is the minimum value of 01? Use your index of refraction from part a. 7 01 60 101 and 0 may be significantly different from the AIR diagram.}