Nov 25, 2024 · In GR, there are geodesic paths clearly determined by position and speed and no force. And it becomes more complicated when the object itself has a significant mass. For …

Jul 20, 2015 · In GR, this is simplified by considering gravity to be a fictitious force just like any other force which is proportional to the mass and cannot be measured by an accelerometer. …

May 20, 2012 · Which is more difficult to understand general relativity or Quantum Mechanics. Neil de Grasse Tyson basically straight-up contradicted himself in a docu on Einstein. In the …

May 19, 2025 · In GR, consider the geodesic path representing one orbit around a massive body. There is also a geodesic connecting the same two events representing a radial out and back …

Jan 3, 2016 · In GR we don't care about this latter energy, because it is not conserved in general (you need some Killing fields to exist, but OP asked us not to mention Killing fields). Finally, in …

May 7, 2017 · About a year ago, I took a course on general relativity. It isn't until now that I realize that, given a metric, I am unsure how to find a particle's dynamics.

Sep 20, 2013 · He claims that this is not possible in GR because the proper time in a gravitational field may have a different dependence on ##x^0## at different points in space. He then goes …

Aug 12, 2018 · I like the sphere. Many of the pitfalls you enter into in GR can actually be traced back to similar issues on the sphere. Including coordinate singularities, Killing vectors, circles …

May 21, 2025 · No, in GR, some timelike geodesics are saddle points and some are local maxima. The usual case is that for sufficiently close points, where one is in the future of the other, there …

Mar 9, 2020 · Summary:: This thread is aimed at gaining insight on the Christoffel symbol in GR context. What I would like to discuss is the following: 1) Is there a Physics reasoning on why …