Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) The radius of curvature of a thin plano-convex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered, then the focal length will be - Sarthaks eConnect
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The radius of curvature of a thin plano-convex lens is 10 cm and the refractive index is 1.5. If the plane surface is silvered, then the focal length will be 

A.

5 cm

B.

10 cm

C.

15 cm

D.

20 cm