Nature of Electromagnetic Wave in Uniform Dusty Plasma

In magnetized dusty plasma, Kinetic Alfv�n wave (KAW) is one of the most important wave in electromagnetic regime and is ubiquitous in space environments for transporting electromagnetic energy. Dust charge fluctuation (DCF) effect on KAW have been studied under space and laboratory conditions using fluid description of the dusty plasma. Using Two Potential Theory, we have obtained the dispersion relation of KAW in a homogeneous dusty plasma under external uniform magnetic field by considering strongly magnetized electrons, finite Larmor radius (FLR) effects of ion and cold, unmagnetized but mobile dust grains. The dispersion relation shows a cutoff frequency for the KAW. DCF effect has been considered to analyze the damping of the electromagnetic KAW which is associated with the electrostatic parallel component of the waves.