I was yesterday on presentation of Kip Thorne about Gravitional waves, and he said that the acceleration is due to the changes of time flow (or gradient or something), so I started to not understand this phenomenon again. Can somebody explain me this please?
Last question, what causes the magnitude of the upward acceleration? You have larger acceleration on bigger objects, is it becouse of the bigger spacetime curvation?
Hello, I have a problem to understand acceleration in GR, objects in free fall move along a geodesic, they are in inertial motion. But observer on Earth can clearly see that falling thing accelerates. What causes the acceleration, when there is no gravititional force? Thanks for answers.
Hello, I have a question. In Feynman lectures vol. I, in chapter 37-2, Feynman has an experiment with bullets.
*Copyright http://www.feynmanlectures.caltech.edu/III_01.html
But the curve for ##P_{12}## looks in the picture is different from his live recorded lectures.
*YouTube -
Is the...
Hello, Riemann tensor ##R^i_{jkl}## 4 indexes, and it should be matrix 16x16 in spacetime if we have time coirdinate - 0 and space coordinates -1,2,3. But how should I write the components to matrix? For example ##\begin{pmatrix}R^0_{000} & R^1_{000} & R^2_{000} ... \\ R^0_{100} & R^1_{100} &...