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No Edit The theory on time travel is incomplete. We need the unifying theory first if we are to make any assessment about General Relativity's and Special Rel
by hacknat 13y ago
No
Edit
The theory on time travel is incomplete. We need the unifying theory first if we are to make any assessment about General Relativity's and Special Relativity's projections about inertial frames.
Special Relativity says that the fundamental laws of physics should be the same across inertial frames. I suspect that our next great Physical theory will do to this idea what Relativity did to Newtonian physics. The answer will be, "well, most of the time".
- rpedela 13y agoHasn't time dilation been verified by experiment?
- hacknat 13y agoTime dilation and time travel are two very different things.
- rpedela 13y agoWhat is the difference?
- hacknat 13y agoTime dilation is about one frame reference, let's call it "a" being simultaneous with another frame reference, "b", yet "a" experiences slower time from the perspective of "b". The classic and dramatic example is if an astronaut left earth and zipped around the galaxy several times at the speed of light. When he/she returned there perception of time would be that they experienced very little of it, while the earth would seem to them to have elapsed over a great deal of time. Is this technically time travel? From a psychological point of view it is absolutely time travel, but from a physics point of view, not really. We all experience time dilation in unnoticeable amounts during our life. Someone who is at a higher altitude than you will experience time a tiny, tiny, tiny amount slower than you. To my mind, time travel means I can go forwards and backwards in time. Time dilation, from a a psychological point of view, is about slowing one thing down relative to another. Like this: https://www.youtube.com/watch?v=AZRYyejNksk#t=9m59s https://www.youtube.com/watch?v=AZRYyejNksk#t=9m59s
- wikiburner 13y agoHaven't Einstein, Hawking, and others made statements that the only indications that time travel is impossible are the issues of time paradoxes and because we haven't seen any evidence of time travelers? I thought besides those issues, they felt it should be theoretically possible?
- hacknat 13y agoYes, and 300 years ago there was no Universal speed limit. Hawking has stated that he has no theoretical objections to time travel, but thinks that there is probably a theoretical reason for why it isn't, he just doesn't know what that might be. Let's not forget, the brightest minds in the world, self admittedly, don't know that much about how the Universe actually works. There are theoretical objections to time travel.