Question

what is lens??????? ​

Answer 1

Basically a lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. ... Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing.

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Answer 2

a lens is a transparent material bounded by two refracting surfaces of which at least one is curved