Determining the images of objects reflected in mirrors is accomplished in much the same way as with lenses. The paths of the light rays from the man's head are traced. If the man is behind the focal point, the ray traveling from the man's head parallel to the horizontal is reflected by the mirror through the focal point. A ray traveling through the focal point is reflected parallel to the horizontal. Where these rays intersect is where the image is formed. In this case, the image is real and upside down.
If the man is standing within the focal point, the rays reflected by the mirror diverge. However, tracing the paths of these reflected rays to the virtual side of the mirror establishes their intersection. The image will be virtual and rightside up.
If the man is standing at the focal point, the rays are reflected from the mirror in a parallel direction, and no image is formed.
