Question

1. What is a lens ? Name the two types of lenses.name any five .​

Answer 1

Answer:

Lens is a transparent medium bounded by 2 surfaces in which, one or both surfaces are spherical. There are 2 types of lens convex and concave.

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Answer 2

Answer:

A transparent material bound by two surfaces, of which one or both surfaces are spherical, forms a lens.

Explanation:

there are many types of lenses:-

1.concave lens

2.convex lens

3.bi-focal lens

4.standard lens

5.speciality lens

6.wide angled lens

7.telephoto lens

8.macro lens