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From: ram@zedat.fu-berlin.de (Stefan Ram)
Newsgroups: sci.physics.relativity
Subject: Re: Strange relativistic silence
Date: 8 Sep 2024 18:47:50 GMT
Organization: Stefan Ram
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Mikko <mikko.levanto@iki.fi> wrote or quoted:
>Everything is poorly understood by someone.
>Relativity is very well understood by some people. Most of them
>do not participate in usenet discussions.

  Einstein was totally thrown for a loop when he found out his
  field equations had multiple solutions in certain areas (the
  "hole argument"). It wasn't until 1980 that Stachel cracked that
  nut and saw it as gauge freedom [0]. So if something stumped even
  a brainiac like Einstein, you can bet your bottom dollar it's a real
  head-scratcher. And this is just one piece of the relativity puzzle!

  Even today, physicists are still going at it hammer and
  tongs over how the radiation from an accelerating electron
  looks to an observer moving alongside it (who, according to
  general relativity, can consider the electron to be at reast).
  Some claim this radiation is hidden behind an event horizon
  for the tag-along observer [1]. It's enough to make your
  head spin faster than a Frisbee at Venice Beach!

[0]

"General covariance and the foundations of general relativity:
eight decades of dispute" (1993-03) by John D. Norton

[1]

C. De Almeida and A. Saa, "The radiation of a uniformly
accelerated charge is beyond the horizon: a simple
derivation," American Journal of Physics, vol. 74, no. 2, 
pp. 154–158, 2006.

Electrodynamics of Radiating Charges, Øyvind Grøn