Question
A ray of light falls on a transparent sphere with centre at C as shown in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is:
Answer: Option B
:
B
Deviation by a aphere is 2(i -r) Here, deviation δ=60∘=2(i−r)
(or) i−r=30∘
∴ r=i−30∘=60∘−30∘=30∘
∴ μ=sinisinr=sin60∘sin30∘=√3
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:
B
Deviation by a aphere is 2(i -r) Here, deviation δ=60∘=2(i−r)
(or) i−r=30∘
∴ r=i−30∘=60∘−30∘=30∘
∴ μ=sinisinr=sin60∘sin30∘=√3
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