Dolfin, Marina (1993) On electromagnetic waves ion isotropic media with dielectric relaxation phenomena described by vectorial internal viariables. Accademia Peloritana dei Pericolanti, Classe di Scienze FF. MM. NN., LXXI. pp. 465-480.
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In some previous papers the propagation and damping of electromagnetic waves in isotropic media with dielectric relaxation phenomena was studied, using the method of nonequi1ibrium thermodynamics (vectorial internal variables). A dynamical constitutive equation (relaxation equation) was obtained, which has the form of a linear relation among the electric field E, the polarization P, the first derivatives of E and P with respect to time and the second derivative of P. The Debye and the De Groot-Mazur equations represents special cases of above mentioned general relation. In this paper we consider electromagnetic pianes waves of a single frequency which propagate in an isotropic homogeneous linear media. We use the relation among E and P which was discussed about, in the case that the eiectric current is not negiected. Hxpiicit expressions for the complex wave vector, the complex dielectric permeability, the phase velocity of the waves and the coefficient for attenuation of the amplitude are derived. Low and high frequencies are examined. Finally, the same quantities are obtained in the case that Debye equation holds, at low and high frequencies. All the results are compared each other from a physical point of view.
|Subjects:||M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Fisiche, Matematiche e Naturali > 1993|
M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Medico-Biologiche > 1993
M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Scienze Giuridiche, Economiche e Politiche > 1993
M.U.S. - Miscellanea > Atti Accademia Peloritana > Classe di Lettere, Filosofia e belle Arti > 1993
|Depositing User:||Dr A F|
|Date Deposited:||21 Sep 2012 11:53|
|Last Modified:||21 Sep 2012 11:53|
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