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How do convex and concave lenses differ in the manner of refracting parallel incident rays?

April 26, 2017concave convex differ lenses manner Mathematics Physics refracting

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How do convex and concave lenses differ in the manner of refracting parallel incident rays?

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A convex lens will cause incident parallel rays to converge at its focal point. A concave lens will cause incident parallel rays to diverge in paths that can be extrapolated to intersect its negative focal point.