  We study the thermal dilepton and photon production from relativistic heavy
ion collisions in presence of viscosities by employing the recently developed
second order dissipative hydrodynamic formulation estimated within a
quasiparticle description of thermal QCD (Quantum Chromo-Dynamics) medium. The
sensitivity of shear and bulk viscous pressures to the temperature dependence
of relaxation time is analyzed within one dimensional boost invariant expansion
of quark gluon plasma (QGP).The dissipative corrections to the phase-space
distribution functions upto first order in gradients are obtained from the
Chapman-Enskog like iterative solution of effective Boltzmann equation in the
relaxation time approximation. Thermal dilepton and photon production rates for
QGP are calculated by employing this viscous modified distribution function.
Yields of these particles are quantified for the longitudinal expansion of QGP
with different temperature dependent relaxation times. Our analysis employing
this second order hydrodynamic model indicates that the spectra of dileptons
and photons gets enhanced by both bulk and shear viscosities and is well
behaved. Also, these particle yields are found to be sensitive to relaxation
time. Further, we do a comparison of these particle spectra with a standard
hydrodynamic formulation.
