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Question
NARRBEGIN: Lens formula relatingThe lens formula relating the image distance, p, to the focal length, f, and object distance, s, is
The magnification of a lens is
NARREND
A movie projector is equipped with a 0.5 m focal length lens that is positioned 0.505 m in front of the film. The distance in front of the lens that a screen must be placed for an image to be in focus is __________.
Answer
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