Question

What is lens ??? Please answer this question...
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Answer 1

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, usually arranged along a common axis

Answer 2

A curved piece of glass that makes things look bigger,clearer etc. when we look through it , is called lens......
There are two types of lens:
1. Concave lens
2. Convex lens

Hope it helps you.... .

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