Lenses
⭐ MasteredA lens is a piece of clear glass or plastic that bends light to make things look bigger or smaller. Magnifying glasses and eyeglasses both use lenses.
Some lenses in telescopes can gather enough light to see stars billions of light-years away.
All about Lenses
A lens is a curved piece of clear material that bends light through refraction. Convex lenses bring light together, while concave lenses spread it out.
Magnifying glasses, eyeglasses, cameras and telescopes all use lenses to control light.
There are two main types. A convex lens is thicker in the middle and makes light come together, which makes things look bigger.
A magnifying glass is a convex lens that helps you read small print. Eyeglasses correct people's vision by bending light so that it lands properly on the retina. Cameras, telescopes and microscopes all depend on lenses to form clear images.
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Real-life uses of Lenses
- Correcting vision with eyeglasses
- Magnifying small objects for study
- Focusing light in cameras and telescopes
Frequently asked questions about Lenses
What does a convex lens do?
It brings light rays together to a focus.
What tools use lenses?
Cameras, telescopes, microscopes and eyeglasses all use lenses.