(2.) Farsightedness (a.) A farsighted person wears glasses that enable her to read a book held at a distance of 25 cm from her eyes, even though her near-point is 75 cm. If the glasses are 2 cm from her eyes, find the focal length and refractive power (1/f) required of the lens to place the image of the book at the near point. (b.) A second person has a near-point distance that is greater than 125.0 cm. Is the refractive power of the lens in diopters greater than or less than the refractive power in part (a.)? Calculate the refractive strength for both lenses in diopters.

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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(2.) Farsightedness
(a.) A farsighted person wears glasses that enable her to read a book held at a distance of 25 cm from
her eyes, even though her near-point is 75 cm. If the glasses are 2 cm from her eyes, find the focal
length and refractive power (1/f) required of the lens to place the image of the book at the near point.
(b.) A second person has a near-point distance that is greater than 125.0 cm. Is the refractive power of
the lens in diopters greater than or less than the refractive power in part (a.)? Calculate the refractive
strength for both lenses in diopters.
Transcribed Image Text:(2.) Farsightedness (a.) A farsighted person wears glasses that enable her to read a book held at a distance of 25 cm from her eyes, even though her near-point is 75 cm. If the glasses are 2 cm from her eyes, find the focal length and refractive power (1/f) required of the lens to place the image of the book at the near point. (b.) A second person has a near-point distance that is greater than 125.0 cm. Is the refractive power of the lens in diopters greater than or less than the refractive power in part (a.)? Calculate the refractive strength for both lenses in diopters.
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