Middle-aged man starts to wear eye glasses with lenses

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A middle-aged man starts to wear eye glasses with lenses of1.5 D that allow him to read a book held as close as25 {\rm cm}. Several years later, hefinds that he must hold a book no closer than 33 cm to read it clearly with the same glasses, sohe gets new glasses.What is the power of the new lenses?

Reference no: EM13655798

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