A photographer uses his camera, whose lens has a 50 mm
Chapter 19, Problem 4P(choose chapter or problem)
Problem 4P
A photographer uses his camera, whose lens has a 50 mm focal length, to focus on an object 2.0 m away. He then wants to take a picture of an object that is 40 cm away. How far, and in which direction, must the lens move to focus on this second object?
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