Question

write any four uses of convex lens

Answer 1

● In microscopes.
● In magnifying glass
● In lens of camera
● In the correction of hypermetropia

Answer 2

Used in magnifying glasses

One of the most direct and simplest uses of convex lens is in a magnifying glass. As the light rays enter the convex lens of the magnifying glass, it becomes focused to a specific focal point in front of the center of the lens. Once the magnifying glass is in the optimal distance. The focal point will reach the object, therefore maximum magnification of the object will be generated.

Convex lens used in eyeglasses

A person can become farsighted or nearsighted as the eye lens fails to focus the light on the retina properly. The lens of a person who is suffering from farsightedness focuses the image far behind the retina. Therefore it causes difficulty for the person to focus on the objects that are close to the eye. A convex lens, when placed in front of the eye, bends the light rays which shortens the focal point and the light focuses on the retina in a proper manner.

Uses of convex lens in cameras

Convex lenses are used widely in camera to not only focus an image but also to magnify it. Almost all lenses of cameras consist of a convex lens followed by a concave lens, followed by a second convex lens. The magnification level of the image is controlled by the first lens by moving away from or towards the object.

Used in microscopes

Microscopes use a convex lens to generate extremely magnified images of very small objects. Simple microscopes mostly consist of three lenses. The lens at the end of the simple microscope produces an inverted and magnified image.