13_Chapter 22 HomeworkCH22 Reflection and Refraction of Light

13_Chapter 22 HomeworkCH22 Reflection and Refraction of Light

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Reflection and Refraction of Light 245 22.21 From Snell’s law, the angle of incidence at the air-oil interface is () 1 1 sin sin 1.48 sin20.0 sin 30.4 1.00 oil oil air n n θ  =   ° == ° and the angle of refraction as the light enters the water is ( ) 11 1.48 sin20.0 sin sin sin 22.3 1.333 oil oil water n n −− ° = ° S±²³´µ¶·¸ ¹ºº»³ ´¶µ ± »¼»¹½ºº w´¾¸µ ± »¼»¹½¿¿¿ ± ¹ ± ¹ ± À ± À 22.22 The angle of incidence at the water surface is 1 1 90.0 m tan 42.0 100 m    ° Then, Snell’s law gives the angle of refraction as 1 2 sin sin sin water air n n so the height of the building is 2 210 m 210 m 107 m
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This document was uploaded on 10/20/2011.

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