Electromagnetic inertia, reactive energy, and energy flow velocity

Details Electromagnetic inertia, reactive energy, and energy flow velocity Electromagnetic inertia, reactive energy, and energy flow velocity

2011-05-24

arxiv.org/abs/1105.4834v1

J. Phys. A: Math. Theor. 44 (2011) 345206

Physics

Classical Physics

20 pages, 7 figures

Scientific paper

In a recent paper titled "Coherent electromagnetic wavelets and their twisting null congruences," I defined the local inertia density (I), reactive energy density (R), and energy flow velocity (v) of an electromagnetic field. These are the field equivalents of the mass, rest energy, and velocity of a relativistic particle. Thus R and I are Lorentz-invariant and |v|<=c, with equality if and only if R=0. The exceptional fields with |v|=c were called "coherent" because their energy moves in complete harmony with the field, leaving no inertia or reactive energy behind. Generic electromagnetic fields become coherent only in the far zone. Elsewhere, their energy flows at speeds |v|

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