Ganguly, Avijit K.Konar, Sushan2012-03-122012-03-122000-07-04http://hdl.handle.net/11007/1201In continuation to our earlier work, in which the structure of the vacuum polarisation tensor in a medium was analysed in presence of a background electro-magnetic field, we discuss the absorptive part of the vacuum polarization tensor. Using the real time formalism of finite temperature field theory we calculate the absorptive part of 1-loop vacuum polarisation tensor in the weak field limit (eB < m2 ). Estimates of the absorption probability are also made for different physical conditions of the background medium.enElectro-magnetic Waves:AbsorptionMagnetized MediumPreprint