Chapter 33, Problem 60P

(II) A converging lens of focal length ƒ = 12 cm is being used by a writer as a magnifying glass to read some fine print on his book contract. Initially, the writer holds the lens above the line print so that its image is at infinity. To get a better look, he then moves the lens so that the image is at his 25-cm near point. How far, and in what direction (toward or away from the fine print) did the writer move the lens? Assume the writer’s eye is adjusted to remain always very near the magnifying glass.