Radius of curvature, r =
f/2
2f
2/3 f
f
Army personnel and scouts use _____ for signalling
Concave
Convex
Plane
None of these
An image formed by a plane mirror is a/an
Virtual image
real image
Inverted image
A centre of a spherical mirror is called the
Centre of curvature
Pole of the mirror
Axis of the mirror
In a concave mirror, the object is at infinity then the image formed is
Infinity
At the focus
At the centre of curvature
Behind the mirror
In a concave mirror the object is at the focus, the image is at
at infinity
The focus
Concave mirror is used in
Solar devices
Car headlights
Dentist's mirror
All of these
A spherical mirror in which the outer surface is reflecting is called a ___________ mirror.
__________ is used as shaving mirrors.
Convex mirror
Plane mirror
Concave mirror
_________ is denoted by P.
Principle focus
Pole
Principal axis
