Question

What is a lens? Write it main types.​

Answer 1

Answer:

Types of simple lenses

Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex (or double convex, or just convex) if both surfaces are convex. If both surfaces have the same radius of curvature, the lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave).

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Answer 2

Answer:

A lens can focus light to form an image, unlike a prism, which refracts light without focusing. There are two types of lensesconvex and concave. Convex lenses are lenses that curve outwards, they converge parallel light rays to a focal point. Concave lenses are thinner in the middle and thicker at their edges.

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