Floating Head?

This was just another ordinary picture of a computer work-station in a suburban home and nothing was noticed out of the ordinary until the film was developed. Clearly floating on the computer screen, which was turned off at the time, is a disembodied head which is definitely not someone in the background or the picture-taker herself. The photographer believes it to be the ghost of her deceased husband but he appears much younger than when he left this earth

Ghost Research Society: Ghost Photographs