Before discussing the reflection of light by spherical mirrors we shall discuss the meaning and types of spherical mirror and some important terms related with spherical mirrors.
Spherical Mirror
A spherical mirror is a part of a hollow sphere of glass whose one side is reflecting while the other side is opaque.
Types of Spherical Mirrors
Spherical mirrors are of two types:
1. Concave mirrors
2. Convex mirrors
Concave Mirrors
A concave mirror is that mirror whose reflecting surface is towards the centre of the glass sphere of which the mirror is a part. In concave mirrors the reflection of light rays takes place from the inner surface while the outer surface is polished and opaque.
Convex Mirrors
A convex mirror is that mirror whose reflecting surface is away from the centre of the glass sphere of which the mirror is a part. In convex mirrors the reflection of light rays takes place from the outer surface while the inner surface is opaque.
Test Your Understanding and Answer These Questions:
- Define spherical mirror.
- Write two types of spherical mirrors.
- What is a concave mirror?
- What is a convex mirror?