22_Ch 22 College Physics ProblemCH22 Reflection and Refraction of Light

# 22_Ch 22 College Physics ProblemCH22 Reflection and Refraction of Light

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254 CHAPTER 22 (c) and (d) The other entries are computed similarly and are shown in the table below. (c) air into glass, angles in degrees (d) glass into air, angles in degrees incidence reflection refraction incidence reflection refraction 0 0 0 0 0 0 10.0 10.0 6.43 10.0 10.0 15.6 20.0 20.0 12.7 20.0 20.0 32.0 30.0 30.0 18.8 30.0 30.0 50.8 40.0 40.0 24.5 40.0 40.0 85.1 50.0 50.0 29.6 50.0 50.0 none* 60.0 60.0 34.0 60.0 60.0 none* 70.0 70.0 37.3 70.0 70.0 none* 80.0 80.0 39.4 80.0 80.0 none* 90.0 90.0 40.2 90.0 90.0 none* *total internal reflection 22.45 At the air-ice boundary, Snell’s law gives the angle of refraction in the ice as ( ) 11 1i 1r 1.00 sin30.0 sin sin sin 22.5 1.309 air ice n n θ −−  ° ==   2i 1r 22.5 = ° Since the sides of the ice layer are parallel, the angle of incidence at the ice-water boundary is == ° . Then, from Snell’s law, the angle of refraction in the water
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