Found it! ... More light is on the other side of light :-)
If light follows similar rules to Lenz's Law in the sense that as you approach the speed of light there is an opposite force opposing your approach. Likewise if you slow down or 'pull away' from approaching the speed of light, the force reverses still apposing your decision to slow down. This also happens to coincide with the familiar "objects that are in motion, tend to stay in motion..." ... the same force can create a vacuum or low(er) pressure area ....
Very interesting discussion, especially the bit about time travel. I have spent many hours thinking about the complexity and repercussions of time travel. I think time travel to the future is possible, but i don't think time travel to the past is, because we would be being visited by people from the future right now... Unless, only the governments in the future can control time travel and they don't go back very far in time. Kinda OT, but the thing that always bugged me about time travel, was if the past could be changing all the time(Based on future travelers) and we can't literally see the difference, because the alternate past would be normal to our parents and their parents and in turn, be normal to us? What if our past and present is affected by those from the future? Kinda like in Back To The Future when Marty changes things in the past and his parents are wealthy in the present time and they didn't even know it? Aghhh... Hurts your brain:)
Kinda like in Back To The Future when Marty changes things in the past and his parents are wealthy in the present time and they didn't even know it? Aghhh... Hurts your brain:)
Something like watching all the time jumping in Doctor Who. Ouch!
Definitely possible.. we do that all the time! And you can even change the speed you travel with as well, just move to higher or lower gravity, or at a different speed and you're set. (Did you know that your head and your feet will, in the end, have lived a different life span? Small, but it's in the nanosecond range so it's not zero. Unless you spent most of the time in bed, of course.)
but i don't think time travel to the past is, because we would be being visited by people from the future right now...
The theories about time travel that look at least not completely bonkers seem to imply that you'll never be able to travel into the past beyond the point where the time travel machine was invented.. so we're not visited by anyone from the future simply because there's no time travel machine yet.
An example of this kind of machine is the wormhole loop:
1: Create a wormhole (you'll need exotic matter to keep the openings open. That's negative energy matter, so may present a problem.)
2: Tie one end to home
3: Tie the other end to a spaceship
4: Accelerate the spaceship to as near light-speed as you can, then send it on a round-trip over as many light years you can manage, return to earth
5: Due to relativistic time dilation the spaceship, and its crew, and their end of the wormhole will only have experienced, say, 20 years travel time, so if they left in 2020 it would be 2040 for them.
6: Meanwhile, 300 years passed here on earth.
7: So, when the spaceship end of the wormhole is back at earth you have two ends. Both ends are in the year 2320, but one of those ends is only 20 years away from when it was created, so if you enter that end you'll come out in the year 2040.
8: But you can't go further back than that. And as N years pass you can only go back to 2040 + N.
The scheme above was described in Stephen Baxter's novel 'Timelike Infinity'.
On time travel: I cannot find the source of this simplistic view on time travel (it is quite a few years old) which likened time to a river which we travel naturally with the flow. The energy required to do this is near zero. To travel forward in time we speed up with very little extra energy input. However, to travel back in time we must go against the flow and therefore require a greater energy input to do so.
The theories about time travel that look at least not completely bonkers seem to imply that you'll never be able to travel into the past beyond the point where the time travel machine was invented..
The movie Primer involves time travel with time machines that only work during the span of their creation. It doesn't stop the main characters from making a complete hash out of causality. It's a good movie and impossible to follow on the first viewing. I watched it three times before I was really comfortable with the plot.
Getting back to the original discussion topic. "What happens on the other side of light", IMHO, depending on the observer absolutely nothing!
If you are inside Humanoido's spaceship travelling faster than the speed of light (actually Mo-Dean's spaceship (from the B52's song "Is That You Mo-Dean")) then within it everything would appear the same as if you were stationary. Throw a ball between two travellers and it should travel in a straight line (dependent on any kind of artificial gravity - please don't go there!). Electricity passing in the electronic circuits would still work the same as standing still. Turning on a flashlight, would be exactly the same as standing still, the photons in the flashlight would still travel at the speed of light, between the two travellers anywhere in line of site of eachother. Everything, apart from the usual "space" effects (ie. absence of gravity) would be about the same. Though I'm puzzled on whether external gravity would be something to consider? (Although the model is different, I'm wondering if we could imagine gravity as flux lines of a magnet and Humanoidos spaceship as being a wire loop passing through it, the faster you go the greater the current flow in the loop!). Either the external gravitational forces would tear you apart or would do nothing, or have just a minor wobbling effect. I'd like to think the tea in your cup may wobble due to the differing gravitational forces flashing (or flashed (post tense if they are stationary relative to you) past.
Looking outside of the window would be interesting, again, I'd still contest that it would be completely black looking out the sides and only light when looking forward (cone of black) due to that light misses you as you race past. And as I mentioned before anything ahead of you would appear to hit you at faster than light. Not sure how you'd characterize that, potentially either near infinite energy, or being in two different time space coordinates so doing no damage. Would need to think about that.
Then from the 3 observers (back, side, and front);
- From an observer from looking at you passing - they wouldn't see you.
- Likewise from the observer behind.
- The observer in front would be hit by you but in an earlier timeframe than observed. Again depending on how we look at the collision energies, who know's maybe you pass through them, maybe you both anhilate. No idea.
Now I wonder what would happen if Humanoido's faster than light spaceship (or Mo-Dean's) flew into a black hole? Would it be like a fly hitting treakle, instantainously trapped in the even horizon?
Comments
If light follows similar rules to Lenz's Law in the sense that as you approach the speed of light there is an opposite force opposing your approach. Likewise if you slow down or 'pull away' from approaching the speed of light, the force reverses still apposing your decision to slow down. This also happens to coincide with the familiar "objects that are in motion, tend to stay in motion..." ... the same force can create a vacuum or low(er) pressure area ....
http://www.chalmers.se/en/news/Pages/Chalmers-scientists-create-light-from-vacuum.aspx
Something like watching all the time jumping in Doctor Who. Ouch!
@
http://www.physics.harvard.edu/Thesespdfs/dutton.pdf
The chapter on Bose-Einstein Condensates was pretty cool. ;-)
@
The theories about time travel that look at least not completely bonkers seem to imply that you'll never be able to travel into the past beyond the point where the time travel machine was invented.. so we're not visited by anyone from the future simply because there's no time travel machine yet.
An example of this kind of machine is the wormhole loop:
1: Create a wormhole (you'll need exotic matter to keep the openings open. That's negative energy matter, so may present a problem.)
2: Tie one end to home
3: Tie the other end to a spaceship
4: Accelerate the spaceship to as near light-speed as you can, then send it on a round-trip over as many light years you can manage, return to earth
5: Due to relativistic time dilation the spaceship, and its crew, and their end of the wormhole will only have experienced, say, 20 years travel time, so if they left in 2020 it would be 2040 for them.
6: Meanwhile, 300 years passed here on earth.
7: So, when the spaceship end of the wormhole is back at earth you have two ends. Both ends are in the year 2320, but one of those ends is only 20 years away from when it was created, so if you enter that end you'll come out in the year 2040.
8: But you can't go further back than that. And as N years pass you can only go back to 2040 + N.
The scheme above was described in Stephen Baxter's novel 'Timelike Infinity'.
-Tor
Tor, I'm very glad you're a forum member.
You just saved me a bunch of typing.
Thank you for your many thoughtful replies.
If you are inside Humanoido's spaceship travelling faster than the speed of light (actually Mo-Dean's spaceship (from the B52's song "Is That You Mo-Dean")) then within it everything would appear the same as if you were stationary. Throw a ball between two travellers and it should travel in a straight line (dependent on any kind of artificial gravity - please don't go there!). Electricity passing in the electronic circuits would still work the same as standing still. Turning on a flashlight, would be exactly the same as standing still, the photons in the flashlight would still travel at the speed of light, between the two travellers anywhere in line of site of eachother. Everything, apart from the usual "space" effects (ie. absence of gravity) would be about the same. Though I'm puzzled on whether external gravity would be something to consider? (Although the model is different, I'm wondering if we could imagine gravity as flux lines of a magnet and Humanoidos spaceship as being a wire loop passing through it, the faster you go the greater the current flow in the loop!). Either the external gravitational forces would tear you apart or would do nothing, or have just a minor wobbling effect. I'd like to think the tea in your cup may wobble due to the differing gravitational forces flashing (or flashed (post tense if they are stationary relative to you) past.
Looking outside of the window would be interesting, again, I'd still contest that it would be completely black looking out the sides and only light when looking forward (cone of black) due to that light misses you as you race past. And as I mentioned before anything ahead of you would appear to hit you at faster than light. Not sure how you'd characterize that, potentially either near infinite energy, or being in two different time space coordinates so doing no damage. Would need to think about that.
Then from the 3 observers (back, side, and front);
- From an observer from looking at you passing - they wouldn't see you.
- Likewise from the observer behind.
- The observer in front would be hit by you but in an earlier timeframe than observed. Again depending on how we look at the collision energies, who know's maybe you pass through them, maybe you both anhilate. No idea.
Now I wonder what would happen if Humanoido's faster than light spaceship (or Mo-Dean's) flew into a black hole? Would it be like a fly hitting treakle, instantainously trapped in the even horizon?