Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1997-06-27
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
No changes - better PS, 13 pages, PS
Scientific paper
The near-field Lienard-Wiechert potential solution of a longitudinally oscillating electrical field produced by an oscillating charge is presented, and the results are compared to the R. P. Feynman multipole far-field solution. The results indicate that the phase speed of a longitudinally oscillating electrical field is much faster than the speed of light in the near field. A similar analysis is presented for a longitudinally oscillating gravitational field produced by a vibrating mass. The result also indicates that the phase speed of a longitudinally oscillating gravitational field is also much faster than the speed of light in the near-field. The possibility of measuring the group speed of a longitudinally oscillating electrical field and a longitudinally oscillating gravitational field, which is commonly thought to be equal to the speed of light, is now being considered. The basic idea is to amplitude-modulate the longitudinal vibration of a charge or a mass and to measure the resultant longitudinal vibration of a nearby charge or a mass due to electrical or gravitational interaction. The modulation signal can then be extracted using a diode detector and the group speed can then be determined from the oscillation frequency, the separation distance between the masses, and the measurement of the phase shift of the modulation signal. If the group speed is equal to the speed of light, then phase shifts on the order of 1 microdegree could be generated with a typical experimental set-up. An analysis using the classical definition of group velocity for a longitudinally oscillating electrical field is presented, and the results indicate that the group speed is also much faster that the speed of light in the near field, which should not be possible due to causality violation.
Dual Jurg
Walker William D.
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