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  4. A person can see objects clearly only upto a maximum distance of 60 cm. His eye defect, nature of the corrective lens and its focal length are respectively

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Q. A person can see objects clearly only upto a maximum distance of $60\, cm$. His eye defect, nature of the corrective lens and its focal length are respectively

Jharkhand CECEJharkhand CECE 2015

Solution:

Range of vision for healthy eye is 25 cm to $ \infty . $ If the person can see clearly only upto a maximum distance of 60 cm. He is suffering from myopia. A short sighted eye can see only nearer objects. This defect can be removed by using a concave lens of suitable focal length $ f=60\,cm. $