what is role of concave lens ?
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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).
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Answer:
Role of concave lens is to diverge a paraxial beam of light
Explanation:
when a concave lens is divided into many trapeziums, they diverge the beam towards their base.
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