12_Chapter 22 HomeworkCH22 Reflection and Refraction of Light

12_Chapter 22 HomeworkCH22 Reflection and Refraction of Light

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244 CHAPTER 22 22.18 At the first surface, the angle of incidence is 1 30.0 θ = ° , and Snell’s law gives () 11 1 2 1.00 sin30.0 sin sin sin 19.5 1.50 air glass n n −−  ° == =   1 ° Since the second surface is parallel to the first, the angle of incidence at the second surface is = 19.5 ° and the angle of refraction is ( ) 2 sin 1.50 sin19.5 sin 30.0 1.00 ss glass air n ° sin gla n = ° Thus, the light emerges traveling parallel to the incident beam. 22.19 The angle of refraction at the first surface is 2 19.5 = ° (see Problem 18). Let h represent the distance from point a to c (that is, the hypotenuse of triangle abc ). Then, 2 2.00 cm
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