STANDARDPhysics-Optics
STANDARD Physics Lenses MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
A
act as a convex lens only for the objects that lie on its curved side.
B
act as a concave lens for the objects that lie on its curved side.
C
act as a convex lens irrespective of the side on which the object lies.
D
act as a concave lens irrespective of side on which the object lies.
Correct Answer
Option C
Detailed Explanation
The lens behaves as a convex lens irrespective of the side on which the object lies because the focal length remains positive in both cases. This is due to the refractive index and the geometry of the lens.
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