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A plano – convex lens made of material o...

A plano – convex lens made of material of refractive index `mu` with radius of curvature R is silvered on the curved side. How far away from the lens–mirror must you place a object so that the image coincides with the object

A

`("R")/(mu)`

B

R

C

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

D

`mu`R

Text Solution

Verified by Experts

The correct Answer is:
A
`P_(M) = 2P_(l) + P_(M) rArr P_(M) = (2 (mu - 1))/( R ) + (2)/(R ) = (2mu )/(R ) rArr f_(M) = (R )/(2 mu)`
Object distnace = `(R )/(mu)`.
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