Question

The radius of curvature of a thin plano-convex lens is 10 cm
(of curved surface) and the refractive index is 1.5. If the
plane surface is silvered, then it behaves like a concave
mirror of focal length
(a) 10 cm (b) 15 cm (c) 20 cm (d) 5 cm

Answer 1

Answer:

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Answer 2

20 cm

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