propagation speed
evolution
Coulomb field
articles
behavior
field
The problem of gravity propagation has been subject of discussion for quite a long time: Newton, Laplace and, in relatively more modern times, Eddington pointed out that, if gravity propagated with finite velocity, planet motion around the sun would become unstable due to a torque originating from time lag of the gravitational interactions. Such an odd behavior can be found also in electromagnetism, when one computes the propagation of the electric fields generated by a set of uniformly moving charges. As a matter of fact the Liénard–Weichert retarded potential leads to the same formula as the one obtained assuming that the electric field propagate with infinite velocity. The Feynman explanation for this apparent paradox was based on the fact that uniform motions last indefinitely. To verify such an explanation, we performed an experiment to measure the time/space evolution of the electric field generated by an uniformly moving electron beam. The results we obtain, on a finite lifetime kinematical state, are compatible with an electric field rigidly carried by the beam itself.
lifetime kinematical state
electromagnetism
gravitational interaction
finite lifetime kinematical state
Measuring propagation speed of Coulomb fields
velocity
paradox
experiments
gravity propagation
apparent paradox
2015-03-24
interaction
Eddington
time
same formula
matter
long time
torque
Liénard–Weichert
state
https://doi.org/10.1140/epjc/s10052-015-3355-3
Newton
en
true
one
lag
2015-03-24
beam
time/space evolution
kinematical states
infinite velocity
fact
electric field
137
Feynman explanation
2022-01-01T18:37
time lag
results
Sun
motion
set
finite velocity
space evolution
article
problem
electron beam
speed
discussion
Laplace
charge
explanation
odd behavior
https://scigraph.springernature.com/explorer/license/
formula
propagation
gravity
uniform motion
planet motion
modern times
matter of fact
1434-6044
1434-6052
Springer Nature
European Physical Journal C
dimensions_id
pub.1038969232
10.1140/epjc/s10052-015-3355-3
doi
Physical Sciences
Piccolo
M.
Pizzella
G.
G.
Finocchiaro
R.
de Sangro
P.
Patteri
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Frascati, Italy
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Frascati, Italy
Springer Nature - SN SciGraph project
75
Other Physical Sciences
3