The Compton wavelength is understood in the standard model to be the distance over which the mass of a particle exists. In digital wave theory, the Compton wavelength is another type of λ-hop that a Planck Instance can make . Usually Planck Instances create light energy, and they are 1. spaced at uniform wavelength intervals, and 2. each appearance moves in the same direction. When we get to wavelengths shorter than that for the most energetic light (10-12 meters), Planck Instances do something “funny”, they reverse direction when they appear. This funniness can be thought of as a spontaneous change of spin. When a Planck Instance hops back and forth at a Compton wavelength it looks as if it is trapped between two mirrors