  We calculate the photon emission rate and the electrical conductivity of the
QGP at finite temperature and finite chemical potential using AdS/QCD
approximations in an AdS Reissner Nordstrom background. To do so, we supposed
the medium properties to be encoded in a geometric background. The results
obtained in the hard wall and soft wall model are consistent with the observed
phenomenology and they also in agree with other holographic results, as the
D3/D7 or the Sakai Sugimoto models, suggesting the universality of AdS/CFT
conjecture as tool to explore QCD.
