4 ms·
>I'm not sure that this can be used to violate causality. If you can transmit any information from point A to point B faster than light would travel from point
by nessus42 14y ago
>I'm not sure that this can be used to violate causality.
If you can transmit any information from point A to point B faster than light would travel from point A to point B in a vacuum, then there are inertial frames of reference in which the information arrived at point B before it left point A.
It's really just as simple and plain as that. You need consider nothing further once you know the above facts.
- spullara 14y agoBased on this effect though, it doesn't travel from point A to point B faster than the speed of light. Point A and point B are literally much closer together. Perhaps the space time distortion makes impossible to think of it in terms of static frames of reference.
- nessus42 14y agoIf you've somehow made A and B closer together, then you've made a wormhole, not a warp drive. Wormholes also come with "closed time-like loops", which allow for time travel.
- spullara 14y agoI don't know. This isn't something covered by special relativity. You certainly don't need a wormhole though. http://curious.astro.cornell.edu/question.php?number=575 http://curious.astro.cornell.edu/question.php?number=575
- nessus42 14y agoYes, there are parts of the universe traveling away from us at faster than the speed of light. In fact, it's quite likely that the universe is infinitely big and an infinitely large part of it is traveling away from us at faster than the speed of light. This fact, however, does not allow information to be transmitted between two points in space at faster than the speed of light. That's the important constraint here. Causality is only violated when you transmit INFORMATION between TWO POINTS at faster than the speed of light.