Question

- What is a concave lens ?

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Answer 1

Answer:

Lens that has one surface curved inwards ie, think at middle think at periphery.

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Answer 2

Answer:

A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).