Ans. SPHERICAL MIRROR
A mirror whose polished, reflecting surface is a part of a hollow sphere of glass or plastic is called a spherical mirror.
Types of Spherical Mirrors
Depending upon the nature of reflecting surface, there are two types of spherical mirrors:
1. Concave mirror
2. Convex mirror
Concave Mirror .
A spherical mirror whose inner curved surface is reflecting is called concave mirror.
In case of a concave mirror, the size of the image depends on the position of the object. Both virtual and real images can be formed by a concave mirror.
Convex Mirror
A spherical mirror whose outer curved surface is reflecting is called convex mirror.
In case of a convex mirror, the size of the image is always smaller than the object. Only virtual and erect image is formed by a convex mirror.