Physics

[akbar]

The topic of time travel has fascinated me for years...it all started by watching back to the future numerous times....so what do u guys think..is it possible?..if not now perhaps in the future??...i would surely like to undo some stupid mistakes that i made :P

[russ_watters]

No. It breaks Einstein's relativity.

[w00t]

Originally posted by russ_watters
No. It breaks Einstein's relativity.

So what? Every scientific "theory" is not correct. Many "laws" have been proven to be wrong as technology and human kind advances. So the only conclusion you could come to is that time travel is not probable because it breaks Einstein's relativity model. But, all together possible.

Personally I don't think time travel is possible either. Time is based on a concept we as humans made...

[dighn]

Originally posted by akbar
The topic of time travel has fascinated me for years...it all started by watching back to the future numerous times....so what do u guys think..is it possible?..if not now perhaps in the future??...i would surely like to undo some stupid mistakes that i made :P

i dont think anyone honestly knows. there are some theories that forbid time travel but really who knows for certain?

anyway there is a way to kind of travel to the future. just go near the speed of light. if you can go fast enough for say 1 second of your time to equal to 999 years on earth, go for 1 second and you could say you travelled to the year 3001 ad LOL

[clickx17]

How would you even travel back in time?

[BoogyMan]

Originally posted by clickx17
How would you even travel back in time?

I seriously doubt you can. Unless "time" is a constantly shifting series of parallel universes, all static in their moment of existence.

[elimc]

Know one will really know until we formulate a quantuum theory of gravity. Going back in time would create a lot of problems (Kill your grandfather and you wouldn't be born, so you couldn't kill your grandfather).

[dighn]

Originally posted by elimc
Know one will really know until we formulate a quantuum theory of gravity. Going back in time would create a lot of problems (Kill your grandfather and you wouldn't be born, so you couldn't kill your grandfather).

why gravity?

[elimc]

Gravity is the only force we don't have a quantum theory for. Once we understand gravity, all the other theories should fit into place like a puzzle. Without gravity, we can only factor in time travel using the other 3 forces and so our equations couldn't take into account of the effects of quantum gravity.

You see, without knowledge of quantum gravity, there are too many variables in the time travel equations. Anything thought up now would be incomplete at best.

[clickx17]

It doesn't seem possible.

[pwain]

Originally posted by clickx17
How would you even travel back in time?

I could see maybe the future, but I dont think you could travel back in time before the invention of the time machine.

I think it might be possible, but not in my lief time.

[avatar4277]

Originally posted by russ_watters
No. It breaks Einstein's relativity.

to the contrary, it is based on einstein's relativity. As you approach the speed of light, time slows down until it would stop at lightspeed. So if you travelled 50 lightyears away from earth and then 50 lightyears back at the speed of light, 100 years would pass on earth while you wouldn't pass any time at all.

[dighn]

Originally posted by avatar4277


to the contrary, it is based on einstein's relativity. As you approach the speed of light, time slows down until it would stop at lightspeed. So if you travelled 50 lightyears away from earth and then 50 lightyears back at the speed of light, 100 years would pass on earth while you wouldn't pass any time at all.

i think we all agree with that (maybe not the @ light speed part but that's beside the point.) i think mainly they are investigatng the possibility of travelling back in time

how that is not allowed by relativity i dont nkow

[Mayson]

Originally posted by avatar4277


to the contrary, it is based on einstein's relativity. As you approach the speed of light, time slows down until it would stop at lightspeed. So if you travelled 50 lightyears away from earth and then 50 lightyears back at the speed of light, 100 years would pass on earth while you wouldn't pass any time at all.

I think he was referring to the fact that although Einstein's theory of relativity allows different observers in different reference frames to measure a different time for the same event even to the extreme where they may disagree on the sequence of two events. For example: one observer may see event 1 happen and then event number 2 though another may see event 2 happen first. This only applies to events that are not caused by each other. For example, if event number 2 is caused by event number one it is impossible for any observer to see the effect (event 2) happen before the cause (event 1). Though this won't allow you to travel back in time, you can travel forward in a fashion that was already mentioned (By going real fast)

[chucko]

Originally posted by CadetLee




This is getting a bit too complex for me...

Has anybody actually managed to do some experiments with space-time stuff, or is this all hypothetical mathematical calculations?
This is strange..but if everything starts distorting, what if logic/math itself distorts, so 2 + 2 != 4?

i've heard of time experiments where they have 2 clocks set exactly the same, then send one to outer space, comes back, and its off from the other clock by a fraction of a second.

btw, i'm prety stoned , so this seems extra interesting!