2. A convex lens has a focal length of 12cm.An object is placed at some distance from the lens so that an image is formed at a distance of 24 cm in front of the lens. Then the distance between the object and the lens.
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This means that the distance of image from the convex lens or image distance will be 12 cm. Since a real image is fomred on the right side of the lens, so this image distance will be positive. Thus, the obect should be place at a distance of 60 cm in front of the convex lens.
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