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:
Text Solution
Verified by ExpertsThe correct answer is:
D
After silvering the plane surface, planoconvex lens behaves as a concave mirror of focal length
but 
Now, from lens maker's formula,
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