A magnifying glass has a converging lens of focal length of 10.3 cm. At what distance from a nickel should you hold this lens to get an image with a magnification of +1.53?

Answer 1

F = 10.3 cm; f/d = 1.53; f = 1.53d; 1/F = 1/d + 1/f; 1/10.3 = 1/d + 1/(1.53d), 1/10.3 = 2.53/(1.53d);

d = 10.3·2.53/1.53 = 16.536 cm

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