Answers to Ch. 17
I have no degrees key in blogger. Almost all numbers are numbers of degrees.
31 a. 53, b. 106
33 1.46
41 a. 25, b. 29
42 1.24 *10^8m/s
54 red light, 12, blue light 11.8
57 angle in glass is 28, strikes upper side at 62 from normal, reflects, strikes far side at 28 from normal, refracts into air at 45.
58 note incident angle is 30. for red 19.3, blue 19.1,
