The magnifications produced by a convex lens for two different positions of an object are m and m respectively m m If d is the

Question

The magnifications produced by a convex lens for two different positions of an object are m and m respectively m m If d is the distance of separation between the two positions of the object then the focal length of the lens is 1 m m 3 dm m m m 2 4 d m m d m m

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