A thin prism P of angle 4° made of glass of refractive index 1.54 is combined to a thin prism Q made of glass of refractive index 1.72 to produce dispersion without deviation. The angle of prism Q is :
Text Solution
Verified by ExpertsThe correct answer is:
B
(n p – 1) A p = (n Q – 1) A Q
(1.54 – 1) 4° = (1.72 – 1) A Q
⇒ A Q = 
= 3º
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