An upright image is magnified, appearing to be four times the size of the object’s when the object is placed 26.9 cm from the lens. Determine the focal length of the lens.

Glencoe Physics: Principles and Problems, Student Edition
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ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter18: Refraction And Lenses
Section: Chapter Questions
Problem 64A
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An upright image is magnified, appearing to be four times the size of the object’s when the object is placed 26.9 cm from the lens. Determine the focal length of the lens.

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