Part of a series of articles about Electromagnetism Electricity Magnetism Electrostatics. Essential features of these jefimrnko are easily observed which is that the right hand sides involve “retarded” time which reflects the “causality” of the expressions.
These equations are the time-dependent generalization of Coulomb’s law and the Biot—Savart law to electrodynamicswhich were originally true only for electrostatic and magnetostatic fields, and steady currents. This page was last edited on 16 Marchat Jefimenko give the electric field and magnetlsm field due to a distribution of electric charges and electric current in space, magntism takes into account the propagation delay retarded time of the fields due to the finite speed of light and relativistic effects.
Retrieved from ” https: JefimenkoElectricity and Magnetism: GriffithsMark A. In other words, the left side of each equation jefimenkp actually “caused” by the right side, unlike the normal differential expressions for Maxwell’s equations where both sides take place simultaneously.
In mangetism typical expressions for Maxwell’s equations there is no doubt that both sides are equal to each other, but as Jefimenko notes, ” There is a widespread interpretation of Maxwell’s equations indicating that spatially varying electric and magnetic fields can cause each other to change in time, thus giving rise to a propagating electromagnetic epectricity  electromagnetism. As pointed out by McDonald,  Jefimenko’s equations seem to appear first in in the second edition of Panofsky and Phillips’s classic textbook.
McDonald, The relation between expressions for time-dependent electromagnetic fields given by Jefimenko and by Panofsky and PhillipsAmerican Journal of Physics 65 11 From Wikipedia, the free encyclopedia.
The electric field is written in a slightly different – but completely equivalent – form. However, Jefimenko’s equations show an alternative point of view. Therefore, we must conclude that an electromagnetic field is a dual entity always having an electric and a magnetic component simultaneously created by their common sources: Electromagnetic tensor stress—energy tensor.
Full text of “Electricity and Magnetism”
In electromagnetismJefimenko’s equations named after Oleg D. They are the general solutions to Maxwell’s equations for any arbitrary distribution of charges and currents. Jefimenko, Solutions of Maxwell’s equations for electric and magnetic fields in arbitrary mediaAmerican Journal of Physics 60 10—