A scientist’s transmitter emits a wavelength of very long wave electromagnetic radiation. We call him One and he watches his wave move through the universe at c. Another scientist, call him Two, approaches One at very nearly c. Two moves directly at One’s wave and nearly dies of fright when he sees a very high energy gamma ray approaching. Fearing possible cell damage and malignant cancer he turns on his magnetic deflector. Just before the gamma ray reaches the magnetic deflector it spontaneously disintegrates into an electron / positron pair. The design of the magnetic deflector is such that the electron and positron are separated in the vacuum of pace and now moving in a plane perpendicular to the direction back to One. One is scratching his head trying to work out how his very long wave turned into an electron / positron pair. Later the electron and positron collide and the resultant gamma ray returns towards a dismayed One. Where did the extra energy come from?