In Fig. 33-58, light from ray A refracts from material 1 (n1 1.60) into a thin layer of

Chapter 33, Problem 60

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In Fig. 33-58, light from ray A refracts from material 1 (n1 1.60) into a thin layer of material 2 (n2 1.80), crosses that layer, and is then incident at the critical angle on the interface between materials 2 and 3 (n3 1.30). (a) What is the value of incident angle uA? (b) If uA is decreased, does part of the light refract into material 3? Light from ray B refracts from material 1 into the thin layer, crosses that layer, and is then incident at the critical angle on the interface between materials 2 and 3. (c) What is the value of incident angle uB? (d) If uB is decreased, does part of the light refract into material 3? n3n1 B An2Figure 33-58 60.

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