Define and show in a diagram, the following terms relating to concave mirrors.
i) Aperture
ii) Radius of curvature
List any four uses of concave mirror.

Explanation

i) The diameter of the reflecting surface of the mirror is called aperature .

ii) The radius of the sphere of which reflecting surface of the spherical mirror forms a part is called the radius of curvature of the spherical mirror.
Uses of concave mirror are :
`**` Shaving mirror
`**` Reflectors in automobile head light and torches
`**` By dentists to see back side of tooth.
`**` Reflector of solar furnaces.