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+ 50 cm focal length bi-convex lens is recommended to correct the defect of vision of a man. Find the power of the lens.

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+ 50 cm focal length bi-convex lens is recommended to correct the defect of vision of a man. Find the power of the lens.

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Focal length (f) = + 50 cm

Power of the lens (P) = 100/f = 100/50 =2D.

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