Estimate the focal length of the magnifying glass

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A person with a near-point distance of 25 cm finds that a magnifying glass gives an angular magnification that is 1.5 times larger when the image of the magnifier is at the near point than when the image is at infinity. (Assume that the magnifying glass is held directly in front of the person's eyes in each case.) What is the focal length of the magnifying glass? (Include the sign.)

Reference no: EM13547903

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