Wormholes and paradoxes
April 14, 2013 at 6:20 pm
(This post was last modified: April 14, 2013 at 6:22 pm by Napoléon.)
So I've been delving into the whole "will we ever time travel" question, and wormholes.
One of the things I don't buy is this whole idea of shooting yourself from the future to kill yourself in the past.
Now, while reading some of Hawking, he talks about wormholes as though they could be used as a means of FTL travel. And I've heard this idea from other sources too. That if you could pull spacetime back on itself that you'd be able to make a hole from one point to another. It doesn't seem all that illogical (provided you figured out a way to find a hole from one point of space to another, which probably isn't possible realistically).
However watching this video I get rather confused.
http://www.youtube.com/watch?v=UJNhLDwj6kI
This video talks about time travel explicitly. In the sense that, you could view yourself through a wormhole, from a minute in the future.
Now, my understanding of how this would work seems to suggest that this whole idea of wormholes is incompatible with what is suggested by travel with wormholes in the first place. Seeing as everyone has their own account of time, and it depends on where you are in the universe, and not so much when, I don't see how this scenario would ever come to fruition. Logically speaking, if you opened up a wormhole, from one side of the room, to the other, why would that ever mean you would be able to shoot yourself in the past? Now, ofcourse, everything we see is theoretically in the past, but from what I understand of this particular scenario, it wouldn't be like killing yourself from 1 minute ago like the video would suggest, but rather shooting a bullet and having it simply follow its path through the wormhole back at your present self. Where is the need for two versions of yourself in this scenario?
Sorry for the ramble, probably made no sense whatsoever.
Anyways, wormholes being compatible with time travel seems illogical. Thoughts?
One of the things I don't buy is this whole idea of shooting yourself from the future to kill yourself in the past.
Now, while reading some of Hawking, he talks about wormholes as though they could be used as a means of FTL travel. And I've heard this idea from other sources too. That if you could pull spacetime back on itself that you'd be able to make a hole from one point to another. It doesn't seem all that illogical (provided you figured out a way to find a hole from one point of space to another, which probably isn't possible realistically).
However watching this video I get rather confused.
http://www.youtube.com/watch?v=UJNhLDwj6kI
This video talks about time travel explicitly. In the sense that, you could view yourself through a wormhole, from a minute in the future.
Now, my understanding of how this would work seems to suggest that this whole idea of wormholes is incompatible with what is suggested by travel with wormholes in the first place. Seeing as everyone has their own account of time, and it depends on where you are in the universe, and not so much when, I don't see how this scenario would ever come to fruition. Logically speaking, if you opened up a wormhole, from one side of the room, to the other, why would that ever mean you would be able to shoot yourself in the past? Now, ofcourse, everything we see is theoretically in the past, but from what I understand of this particular scenario, it wouldn't be like killing yourself from 1 minute ago like the video would suggest, but rather shooting a bullet and having it simply follow its path through the wormhole back at your present self. Where is the need for two versions of yourself in this scenario?
Sorry for the ramble, probably made no sense whatsoever.
Anyways, wormholes being compatible with time travel seems illogical. Thoughts?
