Final answer:
To magnify an image using a converging lens, the object must be placed closer to the lens than its focal length, creating a virtual and enlarged upright image, referred to as a case 2 image situation.
Step-by-step explanation:
In order to get a magnified image of an object using a converging lens, the object's distance from the lens (object distance, denoted do) must be closer than the focal length of the lens (focal distance, denoted f). This scenario is described as a case 2 image, where the object distance do is less than the focal distance f and the focal distance f is positive. When an object is placed at a distance less than the focal length of a convex lens, a virtual, upright, and magnified image is formed. As the lens is pulled away from the object, the magnification increases, but if moved beyond the focal length, the image will blur and eventually invert. To achieve the most comfortable viewing with a magnifying lens, where the eye is relaxed, the magnification is the ratio of the near-point distance to the focal length of the lens. This indicates that lenses with shorter focal lengths provide stronger magnifications. Using a converging lens as a magnifier requires that the object be positioned within the focal length of the lens to produce an enlarged and upright image.