Question

A mirror produces a magnified and erect image of an object. The nature of the mirror is
A. Plane
B. Neither convex nor concave
C. Concave
D. Convex

Answer 1

Hint:In this question,we are going to apply the concept of image formation by mirror in which we are basically considered the nature of image formed by the different types of mirrors.

Complete step by step answer:
-Plane mirror forms an erect image of the same size as that of an object.
-Convex mirror forms a diminished, virtual and erect image, irrespective of the position of the object.
-Concave mirror forms magnified, erect and virtual image when object is placed between focus and mirror pole (P).
So the correct answer is (C), the nature of the mirror is concave.
Additional information:
In case of concave mirror
-When the object lies at infinity, the image will be formed at focus and will be real, inverted and point in size.
-When an object lies beyond the centre of curvature(c), the image will be formed between F and C and will be real, inverted and smaller in size.
- When the object lies at C, the image will be formed at C and will be real inverted and equal in size.
-When object lies between F and C, the image will be formed beyond C and will be real, inverted and larger in size.
-When object lies at F, the image will be formed at infinity and will be highly magnified.

Note:Always keep in mind that real images are formed in inverted position while the virtual images are formed in erect position.These points help us in choosing the correct sign convention while solving a problem.