17_Ch 22 College Physics ProblemCH22 Reflection and Refraction of Light

17_Ch 22 College Physics ProblemCH22 Reflection and Refraction of Light

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Reflection and Refraction of Light 249 (b) The angle of reflection at each surface equals the angle of incidence at that surface. Thus, ( ) 11 i 30 reflection θ ==° , and ( ) 22 i 41 reflection θθ = 22.32 For the violet light, , and 1.66 glass n = 1 1r 1 sin 1 sin 27.5 =  ==   1r 90 80.0 6 1i sin .00sin50.0 1.66 air glass n n ° 62.5 , 1 ° 0.0 57.5 , α θβ = ° = 32.5 °− = ° = 2i 90.0 and β . The final angle of refraction of the violet light is 2i sin glass air n n 2r 1.66sin32.5 sin sin 63 1.00 −− ° .2 = ° Following the same steps for the red light ( ) 1.62 glass n = 1r 2i 2r 28.2 , 58.2 , 31.8 , and gives 61.8 , 58.6 αβ =°=° Thus, the angular dispersion of the emerging light is 2r violet =− 63.2 58.6 4.6 red Dispersion = ° ° = ° ± ±² ³´³µ¶·¶ ² ³ ´ ¸¶·¶ ² ± ²³´ ³´³±·¶¶
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