ISSN:
1432-0630
Keywords:
03.50.De
;
41.10.Hv
;
42.90.+m
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract In the macroscopic electrodynamics (MED) of good conductors (metals) based on Ohm's law j=σE, the momentum relaxation time τ=σm/ne2 of the electrons limits the application to electromagnetic (EM) processes with characteristic timest≫τ. An interesting physical difficulty occurs in MED since the EM field damping time τR=ɛ/σ of metals is very small compared with the minimum macroscopic time scale, τR≪τ. Consequently, the damping and propagation of EM waves and pulses in good conductors cannot be correctly described within the frame of conventional MED. New hyperbolic EM wave equations with relaxation and memory are proposed, which no longer exhibit the τR≪τ deficiency. The latter is caused by Ohm's law, which breaks down for short-time processes, due to neglect of electron inertia. The advantages of the proposed and the disadvantages of the conventional EM wave equations for good conductors are discussed in applications.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00615132
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