What are the 3 common mirror types that are widely used?

Plane mirror:

A plane mirror is a flat mirror in which the reflecting surface is flat and has no curvature.
The angle of reflection is equal to the angle of incidence, that is, the angle between the light ray and the mirror is equal.
The reflection of a plane mirror produces a virtual image in the mirror, which is equal in size to the real object but in the opposite direction.
The reflection process does not cause the light to focus or disperse, so a plane mirror does not converge or diverge the light.
Flat mirrors are commonly found in cosmetic mirrors, vehicle rearview mirrors, home mirrors, etc., and are used to observe objects or one’s own reflection.
They are also used in optical laboratories for light path adjustment and laser reflection.

Convex mirror (convex lens):

The reflective surface of a convex mirror is convex, showing an outward curved shape.
When the incident light is parallel to the main optical axis, the reflected light will converge to a focus, which is called the actual focus (also called the positive focus of the convex lens).
Convex mirror reflection produces a virtual image that is smaller than the real object, and the virtual image is usually located behind the actual focus.
Convex mirrors are commonly used in magnifying glasses and some lighting equipment, such as vehicle headlights, to focus light.
In ophthalmology, convex lenses are also used to correct farsightedness.

Concave mirror (concave lens):

The reflective surface of a concave mirror is concave, giving it an inward-curved shape.
When the incident light is parallel to the principal optical axis, the reflected light is scattered and appears to come from a virtual focus, called a virtual focus.
Concave mirror reflection produces a virtual image that is smaller than the real object, and the virtual image is usually located in front of the virtual focus.
Concave mirrors are widely used in car rearview mirrors to help expand the driver’s field of vision, especially when approaching.
In ophthalmology, concave mirrors are used to correct myopia.
Concave mirrors are also used in solar reflectors and lighting fixtures to disperse light.