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.

Learn about and revise lenses, magnifying lenses, images and ray diagrams with this GCSE Bitesize Physics revision guide for OCR Gateway.

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 ...

The properties of concave and convex lenses were first described around the year 1000, although magnifiers in the form of lens-shaped crystals or glass may have been used much earlier.