Reflection Of Light

REFLECTION OF LIGHT


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SPHERICAL MIRRORS


       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.

Spherical Mirror     Spherical Mirror


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.

Concave Mirrors

Concave and convex mirror


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.

Convex Mirror



Test Your Understanding and Answer These Questions:




  1. Define spherical mirror.

  2. Write two types of spherical mirrors.

  3. What is a concave mirror?

  4. What is a convex mirror?