Question

A person standing in front of a mirror finds that his image is larger than himself. This implies that the mirror is?

A) Convex

B) Concave

C) Plane

D) Plano-convex

Answer 1

Hint: In this solution, we will use the properties of different kinds of mirrors and their images. We will need a mirror whose image size will be greater than the object size so that the person sees a larger image in the mirror.

Complete answer:

We’ve been told that when a person stands in front of a specific kind of mirror, he sees an image of himself that is larger than him. This implies that the image size will be greater than the object size.For a convex mirror, the image formed by an object will always be smaller than the object in terms of size. So, a convex mirror will always form a smaller image than the object so it is not the correct choice.

For a concave mirror, the image that is formed is usually smaller than the object size. However, if the object is placed between the mirror and the focal point of the mirror only then the image size will be greater than the object size.

So, the correct choice is option (B).

Note:

For a plane mirror, the image size will always be equal to the object size however the person sees a larger image size than the size of the object so it is not the correct choice. Even for a concave lens, a larger image will be formed only when the object is closer to the mirror than its focal length and not in any other case.