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Question: A thin prism P<sub>1</sub> with angle 4º and made from glass of refractive index 1.54 is combined wi...

A thin prism P1 with angle 4º and made from glass of refractive index 1.54 is combined with thin prism P2made from glass of refractive index 1.72 to produce dispersion with out deviation. The angle of prism P2 is

A

5.330

B

40

C

30

D

2.60

Answer

30

Explanation

Solution

(m1 –1) A1 + (m2 – 1) A2 = 0

\ (1.54 – 1) 40 + (1.72 – 1) A2 = 0

\ A2 = – 30