defination of concave and convex lens with their usage.
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The convex lens is curved towards the inside. The concave lens is curved towards the outside. Use. It is used to correct long- sightedness or hypermetropia . It is used to correct short- sightedness or myopia.
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Having an outline or surface that curves inwards like the interior of circle or sphere is called concave .
Convex lens which is also called as a converging lens or positive lens is thicker at the middle .The light rays that pass through a Convex lens coverge or are brought closer together. There are various uses of convex lens like in a microscope ,magnifying glasses ,camera ,correction of hypermetropia etc .
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