The image of an electric bulb fixed in a wall is to be obtained on the wall opposite to it at a distance of 3m. The maximum possible focal length of the convex lens is
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The image of an electric bulb fixed in a wall is to be obtained on the wall opposite to it at a distance of 3m. The maximum possible focal length of the convex lens is The image of an electric bulb fixed in a wall is to be obtained on the wall opposite to it [...]