A convex lens forms a real, diminished point sized image on focus. Then the position of the object is at

a convex lens forms a virtual image of an object. What is the position of the object ?

A convex lens forms a virtual image of an object. What is the position of the object?

A convex lens forms a real image of the object when the lens is at a distance of 1 m from the object. The size of the image is 3 times that of the object. The position of the object and the screen are kept fixed but the distance of lens from the object is doubled. The image is now one half of the size of the object, the focal length of the lens is

A convex lens produces a real image m times the size of the object. What is the distance of the object from the lens ?