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21.The near point and far point of a person are at 60cm and 300cm respectively. Find the power of lens he should use while reading at 30cm. With this lens on the eye, what maximum distance is clearly visible?

Answer» 21.The near point and far point of a person are at 60cm and 300cm respectively. Find the power of lens he should use while reading at 30cm. With this lens on the eye, what maximum distance is clearly visible?


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