Mirror: A mirror is a piece of glass having at least one polished surface and one reflecting surface.
Spherical Mirror: Spherical mirror is that mirror whose reflecting surface is a portion of a hallow sphere of glass. It is of two main types, concave mirror and convex mirror.
1) Concave Mirror:- A concave mirror is that spherical mirror in which the process of reflection takes place at the concave or curved surface.
Convex Mirror:- A convex mirror is that spherical mirror in which the process of reflection takes place at the convex or bulging out surface