7 ms·
What’s interesting to me is that this result shares something with the relativistic theory of gravity: That is, that gravity is a side-effect of the fact that
by skohan 5y ago
What’s interesting to me is that this result shares something with the relativistic theory of gravity:
That is, that gravity is a side-effect of the fact that time moves more slowly closer to centers of mass, which causes the velocity vector of an object moving in space to turn in the direction of the time-speed gradient in space.
- javajosh 5y agoThere is a quantity that nature likes to minimize, which makes it so. See https://en.wikipedia.org/wiki/Stationary-action_principle https://en.wikipedia.org/wiki/Stationary-action_principle
- eternalban 5y agoThanks. That led to a minor reading on a very colorful character: https://21sci-tech.com/Articles%202004/Spring2004/Maupertuis.pdf https://21sci-tech.com/Articles%202004/Spring2004/Maupertuis...
- desmosxxx 5y agoThis is misleading / incomplete. Curviture in the time dimension is not enough to explain gravity. Gravity is caused by curviture in spacetime (4D). It's definitely not intuitive to think about the time dimension (and so makes for a good youtube video), but this "theory" you're talking about isn't anything that wasn't already known when GR was first introduce. I'm not sure if you just meant GR and "accounts for some of gravity", but it's a common mistake I've seen people make after some youtube videos on the subject. See https://physics.stackexchange.com/questions/609217/how-much-of-gravity-is-caused-by-time-dilation https://physics.stackexchange.com/questions/609217/how-much-...
- eurasiantiger 5y agoAren’t there formulations which do away with space-time by treating it as an emergent feature?
- desmosxxx 5y agoYep, you're probably thinking of https://en.wikipedia.org/wiki/Entropic_gravity https://en.wikipedia.org/wiki/Entropic_gravity and/or https://en.wikipedia.org/wiki/ER_%3D_EPR https://en.wikipedia.org/wiki/ER_%3D_EPR, but there are other similar proposals as well. There's enough interesting connections between entanglement and spacetime that it's an interesting area to prod for sure.