- May 25, 2011
- 313
If I couldnt explain myself ; watch this video in order to understand the topic more clearly...
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Is "Time Travel" possible with the speed of light?
- Thread starter Nathan Wootton
- Start date
Hungry Man
New Member
- Jul 21, 2011
- 669
This isn't quite time travel =p Time travel would mean going faster than light. As you reach light speed time "slows down" but you also gain kinetic energy ie; the thing that makes you move.
We know that E=MC^2 ie: energy = mass. Therefor when you take on energy you take on mass. So the KE (kinetic energy) that speeds you up is also slowing you down. The amount of KE (remember, it's mass) you (a single electron) would need to take on to pass light speed (or achieve it) would take is greater than the amount of energy in the universe.
Time travel is unfeasible in this way.
There's also the matter of blue shift. If I'm traveling 5 mph and i hit a poll i hit that poll at 5mph. If I'm traveling at 99% of the speed of light and I hit anything (dust, particles, even light) the energy transferred to me will be huge.
Time travel is much more feasible when you go into ideas like wormholes, which are mostly theoretical and even in that theory they're not the big gaping holes you'd imagine but are in fact subatomic.
We know that E=MC^2 ie: energy = mass. Therefor when you take on energy you take on mass. So the KE (kinetic energy) that speeds you up is also slowing you down. The amount of KE (remember, it's mass) you (a single electron) would need to take on to pass light speed (or achieve it) would take is greater than the amount of energy in the universe.
Time travel is unfeasible in this way.
There's also the matter of blue shift. If I'm traveling 5 mph and i hit a poll i hit that poll at 5mph. If I'm traveling at 99% of the speed of light and I hit anything (dust, particles, even light) the energy transferred to me will be huge.
Time travel is much more feasible when you go into ideas like wormholes, which are mostly theoretical and even in that theory they're not the big gaping holes you'd imagine but are in fact subatomic.
Valentin N
Level 2
- Feb 25, 2011
- 1,314
E=mc² is energy but not the formula to the kinetic energy; I think it's (mv²)/2 (It was some time ago I had physics).
Once we have the 4th dimension then maybe we could travel through time. I will find an interesting video regarding this topic
Once we have the 4th dimension then maybe we could travel through time. I will find an interesting video regarding this topic
Hungry Man
New Member
- Jul 21, 2011
- 669
My point was purely that energy and mass are equivalent. E=MC^2 is the best way to show that since it's the big famous one.
At light speeds mass becomes infinite so we need infinite acceleration to stay put at that speed. This method is not feasible as this is a one way journey and you cant return back. A better idea is to freeze a person at abs0 so that molecular motion ceases and then de-freeze him at a later period. He would have come to the future without aging.
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