Question

An object 4 cm high is placed infront a concave mirror of focal length 12cm. The distance from the pole s 18 cm

Answer 1

Explanation:

A plano-convex lens, when silvered at its plane surface is equivalent to a concave mirror of focal length 28cm. when its curved surface is silvered and the plane surface not silvered,it is equivalent to a concave mirror of focal length 10cm,then the refractive index of the material of the lens is.

Answer 2

Explanation:

A plano-convex lens, when silvered at its plane surface is equivalent to a concave mirror of focal length 28cm. when its curved surface is silvered and the plane surface not silvered,it is equivalent to a concave mirror of focal length 10cm,then the refractive index of the material of the lens is.