Concave lens

Definition

A concave lens is a lens that is thinner in the middle and thicker at the edges, causing light rays to diverge when passing through it.

Related terms

Convex lens:

A convex lens is thicker in the middle and thinner at the edges, causing light rays to converge when passing through it.

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

Virtual image:

Unlike real images, virtual images formed by a concave lens cannot be projected onto a screen. They can only be seen by looking into the lens.