College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 15

A thick piece of Lucite ( n = 1.50) is has the shape of a quarter circle of radius R = 12.0 cm as shown in the side view of Figure P22.61. A light ray traveling in air parallel to the base of the Lucite is incident at a distance h = 6.00 cm above the base and emerges out of the Lucite at an angle with the horizontal. Determine the value of .