The light ray is incidence at angle of 60° on a prism of angle 45°. When the light ray fails on the other surface at 90°, the refractive index of the material of prism μ and the angle of deviation δ are given by
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a
μ=2,δ=30o
b
μ=1.5,δ=15o
c
μ=32,δ=30o
d
μ=32,δ=15o
answer is D.
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Detailed Solution
From figure it is clear that ∠e=∠r2=0From A=r1+r2⇒r2=A=45o∴μ=sin isin r1=sin60osin45o=32Also from i+e=A+δ⇒60+0=45+⇒δ=15o
The light ray is incidence at angle of 60° on a prism of angle 45°. When the light ray fails on the other surface at 90°, the refractive index of the material of prism μ and the angle of deviation δ are given by