What are the uses of convex lens in daily life?

Convex Lens and Its Uses

Convex lenses are thicker at the middle. Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens. When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

A convex lens is like that of a magnifying glass that collectors use to look more closely at specimens. Convex lenses are referred to as converging lenses because they bend light toward a focal point whereas concave (diverging lenses) bend light away from a focal point.

Most high-quality cameras, telescopes and binoculars use concave lenses to improve the quality of the images they provide. Microscopes and reflecting telescopes make use of a concave mirror, a plane mirror, and a convex lens, while refracting telescopes use two convex lenses.

Uses of a convex lens are

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• A convex lens is used in microscopes and magnifying glasses to subject all the light to a specific point.

• A convex lens is used as a camera lens in cameras as they focus light for a clean picture.

• A convex lens is used in the correction of hypermetropia.

Why is a convex lens used in a camera?

Because the camera needs to capture a bundle of light rays originating from a particular point on the subject and reaching the lens; and converge them to a single point at the plane of focus where the film or sensor is.

A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).