Plane mirror

A virtual image is a copy of an object formed at the location from which the light rays appear to come.

However the focal length of a plane mirror is infinity;[4] its optical power is zero.

However, the images formed by them are not of the same size as the object like they are in a plane mirror in all conditions rather specific one .

In a convex mirror, the virtual image formed is always diminished, whereas in a concave mirror when the object is placed between the focus and the pole, an enlarged virtual image is formed.

[6] After silvering, a thin layer of red lead oxide is applied at the back of the mirror.

Most modern plane mirrors are designed with a thin piece of plate glass that protects and strengthens the mirror surface and helps prevent tarnishing.

Historically, mirrors were simply flat pieces of polished copper, obsidian, brass, or a precious metal.

Mathematically, a plane mirror can be considered to be the limit of either a concave or a convex spherical curved mirror as the radius, and therefore the focal length becomes infinity.