To focus a camera on objects at diff erent distances, the
Chapter , Problem 118(choose chapter or problem)
To focus a camera on objects at diff erent distances, the converging lens is moved toward or away from the image sensor, so a sharp image always falls on the sensor. A camera with a telephoto lens (f 5 200.0 mm) is to be focused on an object located fi rst at a distance of 3.5 m and then at 50.0 m. Over what distance must the lens be movable?
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