Here's why:

* Virtual image: A virtual image is formed by the apparent intersection of light rays, not by the actual intersection of light rays. This means the image cannot be projected onto a screen.

* Magnifying glass: A magnifying glass is a converging lens. When an object is placed within the focal length of the lens, the light rays diverge after passing through the lens. Our eyes perceive these diverging rays as originating from a larger, upright, virtual image behind the lens.