An image formed by a plane mirror is a/an

Concave mirror is used in 

The distance between the pole and the principle focus is called, 

Army personnel and scouts use _____ for signalling

The distance of the spherical mirror from reflection can takes place is called its

Radius of curvature, r = 

A spherical mirror in which the outer surface is reflecting is called a ___________ mirror. 

_________ is denoted by P. 

__________ is used as shaving mirrors. 

A centre of a spherical mirror is called the