A thin plano-convex lens acts like a concave mirror of focal length 0. – McqOptions

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1.	A thin plano-convex lens acts like a concave mirror of focal length 0.2 m when silvered from its plane surface. The refractive index of the material of the lens is 1.5. The radius of curvature of the convex surface of the lens will be [KCET 2004]
A.	0.4 m
B.	0.2 m
C.	0.1 m
D.	0.75 m
Answer» C. 0.1 m

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