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Curved surfaces of a plano-convex lens o...

Curved surfaces of a plano-convex lens of refractive index `mu_(1)` and a plano-concave lens of refractive index `mu_(2)` have equal radius of curvature as shown in figure. Find the ratio of radius of curvature to the focal length of the combined lenses.

A

`mu_(1) - mu _(2)`

B

`mu _(2) - mu _(1)`

C

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

D

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

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The correct Answer is:
option 3
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