When sunlight is focussed on a sheet of paper through a convex lens , the paper starts burning , while it does not happen case of a concave lens. Can you state why ?
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Convex lenses concentrates the light energy to one spot on the paper so that the heat
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It does not happen in case of concave lens because concave lens are diverging lens so they can not focus the rays/heat while convex lens are converging lens so they can focus the rays/heat on the piece of paper and the paper rhen starts burning
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