  We briefly recall the tremendous strides in the studies of the parton cascade
model made by Klaus Geiger. Next, we argue that photons may provide
confirmation of several of these ideas. Thus we know that, copious internetted
partonic cascades may develop in the wake of relativistic collisions of nuclei
at CERN SPS and BNL RHIC energies, We use the parton cascade model to estimate
the emission of single photons generated from such cascades due to the
branching of quarks $q \to q \gamma$, scattering of quarks and gluons, and
annihilation of quarks. The formation of a hot and dense partonic matter is
shown to be preceded by an intense radiation of photons from the QED branching
of quarks. This is similar to the QCD branching $q \to qg$ which along with the
gluon multiplication ($g \to gg$) which is known to play a crucial role in the
formation of the dense partonic plasma.
