Learn about and revise lenses and their power, real and virtual images, and ray diagrams with GCSE Bitesize Physics.

Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. A lens can be convex ... or concave.

Periscope camera lenses have grown in popularity, especially in the premium smartphone segment. But what is a periscope zoom lens? We explain.

We compare and contrast concave and convex lenses by drawing ray diagrams.

Source: NOVA: "Galileo's Battle for the Heavens" This resource was adapted from NOVA: "Galileo's Battle for the Heavens." The first telescopes, invented in 1608, consisted of two simple concave ...

In other words, the surface of the liquids formed concave or convex curves similar to shape of lenses used in cameras and eyeglasses. And both Kuiper and Hendricks figured out an innovative way to ...