Recent content by Z3kr0m

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?

Which formula is used to calculate the acceleration? The geodesic equation?

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?

Thank you very much for your answers!

So that is the force which stands behind the relative acceleration? Anyway, thank you very much, I understand the concepts a bit more I think. :)

But usn't general relativity based on the fact, that force doesn't exist? The effecte are just the curvature of spacetime.

So the fictitious force which relatively accelerates falling objects is just upwards acceleration from the ground?

So the observer is being accelerated due to floor pushing him upwards? It looks like force to me

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...

Ok, thank you very much!

It's a mistake, there should be ##j## instead of ##k##. It's from wiki: https://en.wikipedia.org/wiki/List_of_formulas_in_Riemannian_geometry

Okay, thank you very much! :)

So I must write out the components one by one?

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} &...