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Lenses

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A lens is a shaped piece of transparent glass or plastic that light. When light is refracted it changes direction due to the change in density as it moves from air into glass or plastic. Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. A lens can be or .

Convex lenses

A convex lens is thicker in the middle than it is at the edges. Parallel light rays that enter the lens . They come together at a point called the .

In a ray diagram, a convex lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens. The distance from the lens to the principal focus is called the .

Concave lenses

A concave lens is thinner in the middle than it is at the edges. This causes parallel rays to . They separate but appear to come from a principle focus on the other side of the lens.

In a ray diagram, a concave lens is drawn as a vertical line with inward facing arrows to indicate the shape of the lens.

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Convex and concave lenses - Lenses - AQA - GCSE Physics (Single Science) Revision - AQA - BBC Bitesize

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A lens is a shaped piece of transparent glass or plastic that light. When light is refracted it changes direction due to the change in density as it moves from air into glass or plastic. Lenses are used in cameras, telescopes, binoculars, microscopes and corrective glasses. A lens can be or .