Thin lens equation

Definition

The thin lens equation is a mathematical formula that relates the distance of an object from a lens, the distance of an image from the lens, and the focal length of the lens.

Related terms

Focal length: The focal length is the distance between the center of a lens or mirror and its focal point.

Object distance: The object distance is the distance between an object and a lens or mirror.

Image distance: The image distance is the distance between an image formed by a lens or mirror and the lens or mirror itself.