Question

what is lens ? how many types of lense are there​

Answer 1

Answer:

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. The two main types of lenses are: Convex Lens (Converging) Concave Lens (Diverging)

Explanation:

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Answer 2

Explanation:

a lens is a piece of glass or other hard clear material molded with one side flat and the other curved or both sides curved that forms an image by bringing together or spreading the light that passes through it. An example of lens is the clear pieces covering the eyes in eye glasses.

The two main types of lenses are:

1.Convex Lens (Converging)

2.Concave Lens (Diverging)