  Using a quantum field theoretic description of the photon it is shown that,
as intuitively expected but not before theoretically proven, the vector
potential of a photon has a likely amplitude associated with a discrete
frequency and therefore energy, and momentum. In particular, by finding the
wave-functional for the vector potential, it is shown that the likely absolute
amplitude spectrum has delta function at a given frequency. This analysis is
extended to n-photon systems. It shows that such systems have a vector
potential distribution whose most likely element has a strong sinusoidal
component which has an amplitude corresponding to n-fold more energy than a
single photon system. An analogous result for photons of different energy is
also derived. Through the use of Parseval's theorem for stochastic systems, the
calculations and associated analyses introduces a simple tool for exploring the
nature of QFT Schrodinger wave-functional generally.
