Question

what is convex and concave lens explanation! ​

Answer 1

concave lens is the lens which is thinner at middle side and thicker at edges where as convex lens is the lens which is thicker at middle and thinner at edges

concave lens is a diverging lens whereas convex lens is converging lens

Explanation:

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Answer 2

a lens made by joining the parts of two spherical surfaces. = Concave lens

a lens made by joining thick lenses.= Concave lens