- #1
fubarite
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erm... just things that i wonder...
ok, I'm basically just a normal average guy and I don't take physics or such but there are things I ponder. My knowledge of the theory of relativity etc is all fairly basic so I can't really back up anything I have just by what I guess is common sense and logic but a lot of the time that's fairly useless.
anyway...
following my understanding of physics we can't travel faster than the speed of light, we can go from A to B faster but actual speed we can't do. However the faster we travel the more time slows down, I'm not sure if it's exponential or linear like half the speed of light is time halved or something...
but we could achieve let's say three-quarters the speed of light. We can't do this now but I'm not sure if you could use an antimatter explosion or something to generate that sort of speed. But my point as it isn't at the speed of light and so you don't have to be weightless it is theoretically possible.
I also believe Time Travel is impossible, not to say slowing down time and then waiting (let's say traveling at the speed of light for 20 years let's you go 20 years into the future) but I don't think it's possible to go back in time unless you count going into some alternate universe that's 10 years in the past or whatever. We "know" that the speed at which light travels allows you to see into the past, an object that's 50 light years away is 50 years in the past when we eventually see it.
Following this logic, if we were say 65 light years away from the Earth NOW and looked back, we'd see 65 years into the past, correct? so if we then went back to Earth and the 65 light years took us 55 light years (if faster then speed of light was possible, again not A to B wormholes but actual speed) then you'd be 10 years into the past.. I think. So in this sense if you could travel faster than the speed of light you would be able to go back in time.
and so to get to my point...
If you were theoretically able to get two spaceships to fly exactly parallel to each other at three-quarters the speed of light each as they passed each other would they in fact be perceiving faster then light relative to each other and so would they be looking into the past? your thoughts if my mumblings made any sense...
p.s. this is my first use of this forum, i have no idea if this is in the right area or if forum even does this sort of thing... I suppose this is quite a philosophical physics question but theoretical physics has always greatly interested me... just not the maths you need to back ideas up...
ok, I'm basically just a normal average guy and I don't take physics or such but there are things I ponder. My knowledge of the theory of relativity etc is all fairly basic so I can't really back up anything I have just by what I guess is common sense and logic but a lot of the time that's fairly useless.
anyway...
following my understanding of physics we can't travel faster than the speed of light, we can go from A to B faster but actual speed we can't do. However the faster we travel the more time slows down, I'm not sure if it's exponential or linear like half the speed of light is time halved or something...
but we could achieve let's say three-quarters the speed of light. We can't do this now but I'm not sure if you could use an antimatter explosion or something to generate that sort of speed. But my point as it isn't at the speed of light and so you don't have to be weightless it is theoretically possible.
I also believe Time Travel is impossible, not to say slowing down time and then waiting (let's say traveling at the speed of light for 20 years let's you go 20 years into the future) but I don't think it's possible to go back in time unless you count going into some alternate universe that's 10 years in the past or whatever. We "know" that the speed at which light travels allows you to see into the past, an object that's 50 light years away is 50 years in the past when we eventually see it.
Following this logic, if we were say 65 light years away from the Earth NOW and looked back, we'd see 65 years into the past, correct? so if we then went back to Earth and the 65 light years took us 55 light years (if faster then speed of light was possible, again not A to B wormholes but actual speed) then you'd be 10 years into the past.. I think. So in this sense if you could travel faster than the speed of light you would be able to go back in time.
and so to get to my point...
If you were theoretically able to get two spaceships to fly exactly parallel to each other at three-quarters the speed of light each as they passed each other would they in fact be perceiving faster then light relative to each other and so would they be looking into the past? your thoughts if my mumblings made any sense...
p.s. this is my first use of this forum, i have no idea if this is in the right area or if forum even does this sort of thing... I suppose this is quite a philosophical physics question but theoretical physics has always greatly interested me... just not the maths you need to back ideas up...