Shown in the figure is a simple magnifier consisting of a
Chapter 2, Problem 81(choose chapter or problem)
Shown in the figure is a simple magnifier consisting of a convex lens. The object to be magnified is positioned so that the distance p from the lens is less than the focal length f. The linear magnification M is the ratio of the image size to the object size. It is shown in physics that . If , how far should the object be placed from the lens so that its image appears at least three times as large? (Compare with Example 6.)
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