Chapter 35, Problem 4P

In Fig. 35-32a, a beam of light in material 1 is incident on a boundary at an angle of 30°. The extent to which the light is bent due to refraction depends, in part, on the index of refraction n₂ of material 2. Figure 35-32b gives the angel of refraction θ₂ verus n₂ for a range of possible n₂ values, from n_a = 1.30 to n_b = 1.90. What is the speed of light in material 1?

Figure 35-32 Problem 4.