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A narrow parallel beam of light falls on...

A narrow parallel beam of light falls on a glass sphere of radius R and refractive index `mu` at normal incidence. The distance of the image from the outer edge is given by-

A

`(R(2-mu))/(2(mu-1))`

B

`(R(2+mu))/(2(mu-1))`

C

`(R(2-mu))/(2(mu+1))`

D

`(R(2+mu))/(2(mu+1))`

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