What is the focal length of the reading glass required by a person whose near point is 90 cm
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The distance of distinct vision is the minimum distance from the eye, at which the ... What focal length should the reading spectacles have for a person whom the least distance of distinct vision is 50cm? ... Need to drive business results that count? .... The human eye is seeing the object clearly at 50 cm.
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Answer: 34.6 cm
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