A prism ABC of angle 30 0 has its face AC silvered. A ray of light incident at an angle of 45 0 at the face AB retraces its path after refraction at face AB and reflection at face AC. The refractive index of the material of the prism is -
A
1.5
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
For 2nd surface
C = 0 ⇒ r 2 = 0
r 1 + r 2 = A
r 1 = 30 0 μ = 
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