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Q.

AB is a horizontal diameter of a glass sphere of radius R. P is the position of a point object on the extended part of AB at a distance x from A. The image of this object is formed at point Q at a distance x from B. Then refractive index of glass is

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a

1+xR

b

Rx

c

xR

d

1+Rx

answer is D.

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Detailed Solution

In this case the refracted ray must be parallel to the diameter AB.For the refraction at the first surface,μ∞-1(-x)=μ-1(+R)⇒μ=1+Rx

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