  Using the opacity expansion technique we investigate the photon radiation and
dilepton production induced by multiple rescattering as energetic parton jet
passing through the strong interacting medium. The real photon radiation and
dilepton invariant-mass spectrums of the bremsstrahlung contribution from an
energetic quark jet are presented. The leading contribution of total energy
loss by photon emmision in medium of a higher energy quark jet is found to be
proportional to the jet energy and has a linear dependence on the thickness of
the nuclear target. The rescattering contribution for the dilepton is important
only for small value of the invariant-mass and for the not so fast jet. The
contribution fraction of the dilepton induced by rescattering in medium is
found to be nearly a constant when the ratio of jet energy to Debye screening
mass $E/\mu$ is large.
