College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 30

A ray of light strikes the midpoint of one face of an equiangular (60° 60° 60°) glass prism ( n = 1.5) at an angle of incidence of 30°. (a) Trace the path of the light ray through the glass and find the angles of incidence and refraction at each surface. (b) If a small fraction of light is also reflected at each surface, what are the angles of reflection at the surfaces