The light reflected from an object by a flat, or plane, mirror is not redirected so it will converge again. What you see when you look in a mirror is a virtual image. It is located behind the mirror. Some of the rays from the object are reflected by the mirror and enter your eye. Your eye believes that all these rays came from a single point, and that point is behind the mirror. The image isn’t real, it is virtual. Virtual images can also be formed by lenses. They cannot be focused on a screen.