A farsighted man uses eyeglasses by a refractive power of


A farsighted man uses eyeglasses by a refractive power of 3.80 Diopters. Wearing the glasses 0.025m from his eyes, he is able to read books held no closer than 0.280 m from his eyes. He would like a prescription for contact lenses to serve the same reason. What is the correct contact lens prescription, in diopters?

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Physics: A farsighted man uses eyeglasses by a refractive power of
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