How can you tell whether a lens is convex or concave?

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How can you tell whether a lens is convex or concave?

PRADEEP KUMAR 5th Nov, 2021

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PRADEEP KUMAR 5th Nov, 2021

The middle of a concave lens is thinner than the edges, while the edges are thicker. A convex lens has a thicker center and thinner margins. Used in cameras, overhead projectors, projector microscopes, basic telescopes, and magnifying glasses, among other things.

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