Question

what is convex lens and concave lens ​

Answer 1

The lens which disperses the light rays around, that hits the lenses, are called a concave lens. In the convex lens, the curve is outward facing, whereas, in the concave lens, the curve faces inward. When the light rays pass through the convex lens, it converges the light rays and focuses on one point.

The distance from the center of the lens to the focal point is the focal length of the lens. The focal point is on the opposite side of the lens to that from which the light rays originate. Convex lenses are used in things like telescopes and binoculars to bring distant light rays to a focus in your eyes.

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).

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Answer 2

ANSWER

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•Convex lens or mirror :- These are also called converging mirror whose outer surface is polished and inner surface is reflecting that types of lens or mirrors are called convex mirrors or lens.

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•Concave lens or mirror :- These are also called Diverging mirrors whose outer surface is reflecting and inner surface is polished this types of mirrors are called Concave mirrors or lens.

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-:Additional Information :-

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•Usses of convex mirrors :-

•They are used in making of sunglasses and windshield of a car.

•Convex mirrors gave rear views so they are used in vehicles as for wider angle view of vehicles coming.

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•Uses of concave mirrors :-

•They are used by the dentists to view a clear and large image of teeth of the patient.

•They are used in headlights of car and vehicles to distribute light in all directions.

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