The author is nearsighted and (at present) is unable to focus clearly on objects that are farther than about 2.0 m from his eyes. (a) What type of lens (converging or diverging) should his eyeglasses contain so that he can focus on more distant objects? (b) What should be the focal length of his eyeglass lenses so that he can focus on a very distant object? Assume the glasses are placed 2.0 cm in front of the eyes. (c) What is the refractive power of the lenses in part (b) in units of diopters?
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