STANDARD Physics Lenses MCQ Question
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.
Correct Answer
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.
Found an issue with this question?
Related Questions
More from
Consider a convex lens used as a simple magnifying glass. If an object is placed at a distance of 5 cm from the lens and the lens has a focal length o...
Assertion (A): The thin lens formula is applicable to both convex and concave lenses for real and virtual images. | Reason (R): The focal points of a ...
Consider a diagram where a parallel beam of light is incident on a concave mirror. The reflected rays converge at a point on the principal axis. What ...