A ray of light is incident at 60 0 on a prism of refracting angle 30 0 . The emerging ray is at an angle 30 0 with the incident ray. The value of refractive index of the prism is -
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
i = 60 0
A = 30 0
δ = 30 0
δ = i + e – A
∴ 30 = 60 + e – 30 0
∴ e = 0
ray will emerge normal to the other surface
sin 60 0 = μ sin 30 0
μ = 
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