An object is 21.0 cm from a converging lens, and the image falls on a screen....
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An object is 21.0 cm from a converging lens, and the image falls on a screen. When the object is moved 4.80 cm closer to the lens, the screen must be moved 3.00 cm farther away from the lens to register a sharp image. Determine the focal length of the lens. An object is 21.0 cm from a converging lens, and the image falls on a screen. When the object is moved 4.80 cm closer to the lens, the screen must be moved 3.00 cm farther away from the lens to register a sharp image. Determine the focal length of the lens.
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