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A camera lens has a focal length of 100 mm (thin lens). The photographer first adjusts...

A camera lens has a focal length of 100 mm (thin lens). The photographer first adjusts the location of the lens to look at an object very far away (infinite distance). Then he tries to take a picture of a person 2 meters away from the lens. How is he going to adjust (move) the lens relative to its original position? What is the distance of the adjustment?

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