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The radius of curvature of curved surfac...

The radius of curvature of curved surface of a thin plano-convex lens is `10 cm` and the refractive index is `1.5`. If the plano surface is silvered, then the focal length will be.

A

15 cm

B

20 cm

C

5 cm

D

10 cm

Text Solution

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The correct Answer is:
D
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