TV Ghosting. In a TV picture, ghost images are formed when the signal from the transmitter travels to the receiver both directly and indirectly after reflection from a building or other large metallic mass. In a 25-inch set, the ghost is about 1.0 cm to the right of the principal image if the reflected signal arrive 0.60µs after the principal signal. In this case, what is the difference in path lengths for the two signals?