The radius of curvature of the curved surface of a plano-co…

Physics Ray Optics Plane Mirror MCQ (Single Correct)

The radius of curvature of the curved surface of a plano-convex lens is 20 cm. If the refractive index of the material of the lens be 1.5, it will

Act as a convex lens only for the objects that lie on its curved side.

Act as a concave lens for the objects that lie on its curved side.

Act as a convex lens irrespective of the side on which the object lies.

Act as a concave lens irrespective of side on which the object lies.

Text Solution

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The correct answer is:

: Here,

If object lies on plane side;

F = + 40 cm. The lens begaves as convex lens.

If object lies on its curved side. Then

f' = 40 cm. The lens behaves as convex lens.

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