A derivation of the Doppler factor in the Lienard-Wiechert potentials
arXiv:2103.02652 · doi:10.1088/1361-6404/ac1145
Abstract
We present an elegant derivation of the Doppler factor in the Lienard-Wiechert potentials of an extended particle, based on a theorem authored by J. L. Synge and dealing with cross-sections through worldtubes.
added one more reference ([3]) and two more sentences at the end of the conclusion