Question

what is a lens? What kind of lens is used as magnifying glass?​

Answer 1

Answer:

A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.

A magnifying glass uses a convex lens.

Explanation:

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Answer 2

a leans is a piece of transparent material with curved surface which is formed in image