Lenses

A mirror is a reflective surface. A lens, on the other hand, does not reflect light; it refracts it

A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of which light rays are refracted so that they converge or diverge to form an image.

A diagram showing the paths of selected rays through an optical system.

A thin lens is a lens with a thickness that is negligible compared to the focal length of the lens.

Mirrors is a surface capable of reflecting sufficient undiffused light to form an image of an object placed in front of it.

Magnification is the process of enlarging something only in appearance, not in physical size.