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A person needs a lens of power –5.5 dioptres for correcting his near vision and he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting? (i) distant vision (ii) near vision |
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Answer» A person needs a lens of power –5.5 dioptres for correcting his near vision and he needs a lens of power +1.5 dioptre. What is the focal length of the lens required for correcting? (i) distant vision (ii) near vision |
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