General relativity is a theory which uses the mathematical framework known as (semi-)Riemannian geometry. In this branch of mathematics, one studies spaces which are in a …

According to them, Einstein would have gotten this information (43 "arc) and" adjusted "the arguments for the result of the equation, previously known, were achieved, because I knew …

The equivalence principle isn't the origin of general relativity in the sense that you start with the equivalence principle and several pages of maths later end up with general relativity. It is more …

General Theory of Relativity is much more than this. But, this is where Newtonian Mechanics will not agree with General Theory of Relativity & vice versa. In practice, however, Newtonian …

The scale factor can be derived from the Hubble parameter $$ H(a) = \frac{\dot{a}}{a} = H_0\sqrt{\Omega_{R,0}\,a^{-4} + \Omega_{M,0}\,a^{-3} + \Omega_{K,0}\,a^{-2 ...

2020年7月10日 · A genuine derivation of the Friedmann equation would go through general relativity. ... general relativity.

What relativity did is expand the range of physical conditions over which the theory applied. Special relativity extended the range to include high speeds, and general relativity extended it …

2019年10月26日 · It might help to see what's going on, if you know where that equation came from. That expression for gravitational time dilation comes from the Schwarzschild solution to …

2013年3月20日 · In the case of general relativity, the gravitational field tells you the geometry of spacetime, and it's the curvature of this geometry that particles "ineract with" in when they …

A derivation of Einstein's equation isn't why the Equivalence principle is central to GR. The reason that the equivalence principle is central to GR is in the fact that you can represent the …