Converging (Convex) Lenses

This lesson covers converging (convex) lenses as required by the Edexcel GCSE Physics specification (1PH0), Topic 5: Light and the Electromagnetic Spectrum. You need to understand focal point, focal length, how to draw ray diagrams, and how the position of the object determines the type of image formed.

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What Is a Converging Lens?

A converging lens (also called a convex lens) is thicker in the middle than at the edges. It causes parallel rays of light to converge (come together) to a single point called the focal point (or principal focus).

Key Definitions