ABSTRACT
After having identified the source domain of the transverse photon, and discussed the structure of the domain in a number of special cases, we turn our attention to an analysis of the propagation of the photon field from a given source. In the four-momentum (∼ frequency − wave-vector) representation the Feynman photon propagator is obtained from the massive photon propagator letting the Compton wave-number go to zero, cf. the analysis in Sec. 12.5.
