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Focus of a Convex Lens

39.Two conver...

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39.Two converging lenses with focal length f and 2f are positioned at 3f distance apart.A parallel beam of light is incident on the lens with focal length f.If d is the incident beam width,what is the width of the emerging beam?

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Q. Two converging lenses with focal lengths f and 2f are positioned at a distance 3f apart. A parallel beam of light is incident on the lens with focal length f. If d is the incident beam width, what is the width of the emerging beam?

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