JEE PHYSICS MCQ: RAY OPTICS

1 Medium

1 of 1

Application +4 | -1

A plano-convex lens when silvered in the plane side behaves like a concave mirror of focal length

30\,\,cm

. However, when silvered on the convex side it behaves like a concave mirror of focal length

10\,\,cm

. Then the refractive index of its material will be

View answer and explanation

Correct option: D

1.5

Option D (1.5) is correct because it is the correct refractive index calculated from the given focal lengths when the lens is silvered on different sides.

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