Question

A plano convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lens are made of different materials of refractive indices and is the radius of curvature of the curved surface of the lenses, then the focal length of the combination isΒ 

A

B

C

D

Medium
Solution
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Correct option is D)

Β Hence option (D) is correct

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