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An isosceles prism of angle 120oC has a refractive index 1.44. Two parallel monochromatic rays enter the prism parallel to each other in air as shown. The rays emerge from the opposite faces

An isosceles prism of angle 120oC has a refractive index 1.44. Two parallel

monochromatic rays enter the prism parallel to each other in air as shown. The

rays emerge from the opposite faces

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1 Answers

Aman Bansal
592 Points
10 years ago

Dear Hari,

At point A, sin30o/sinr = 1/1.44

 => r = sin–1 (0.72) also ? BAD = 180o – ?r

In rectange ABCD, ?A + ?B + ?C + ?D = 360o

=> (180o – r) + 60o + (180o – r) + q = 360o

=> q = 2 [sin–1 (0.72) – 30o]

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Aman Bansal

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