FTL and time travel

[SinJin]

Could someone explain to me, in very dumbed down terms, why faster-than-light speeds are associated with traveling back in time? In other words, sending something faster than light could theoretically send it back in time. I don't get this. I understand the theories of general and special relativity. I understand the basics of quantum mechanics. But whenever I try to read an explanation of why FTL could possibly lead to time traveling into the past, I get lost. And it's been really bugging me lately! Thanks in advanced, I appreciate any help I can get.

[ema]

ok sinjin...
where u heared that travel in the past means traveling with speed higher than speed of light?

i know that needs only different michanism, and b sure i will try to find it for u exactly...
waitin for me then..
eme

[dleviwing]

Actually it’s only a mathematical phenomena and not a physical one. Uniform motion reduces the “degree of freedom” and thus appears to slow molecular movement. This is often interpreted in the math as slowing of time. QM does not incorporate this mathematical error even though some attempt to say it does.

[quanta07]

Could someone explain to me, in very dumbed down terms, why faster-than-light speeds are associated with traveling back in time? In other words, sending something faster than light could theoretically send it back in time. I don't get this. I understand the theories of general and special relativity. I understand the basics of quantum mechanics. But whenever I try to read an explanation of why FTL could possibly lead to time traveling into the past, I get lost. And it's been really bugging me lately! Thanks in advanced, I appreciate any help I can get.

There is a clock and an observer. The observer moves away from the clock with increasing velocity.
The observer receives light reflected by the clock hands. As the observers velocity approaches 'C', the hands of the clock appear to slow. At 'C', the second hand appears to stop. Exceed 'C', the hands appear to reverse direction and move backwards.
Does this mean that 'FTL' leads to time travel into the past?
Not to me...I believe light is the key to time travel.....Q7

[mkirkpatrick]

There is a clock and an observer. The observer moves away from the clock with increasing velocity.
The observer receives light reflected by the clock hands. As the observers velocity approaches 'C', the hands of the clock appear to slow. At 'C', the second hand appears to stop. Exceed 'C', the hands appear to reverse direction and move backwards.
Does this mean that 'FTL' leads to time travel into the past?
Not to me...I believe light is the key to time travel.....Q7

I would tend to think that as well Q7,light seems to be the key that will unlock this mystery.

kind regards michael.

[Guille]

Actually it’s only a mathematical phenomena and not a physical one. Uniform motion reduces the “degree of freedom” and thus appears to slow molecular movement. This is often interpreted in the math as slowing of time. QM does not incorporate this mathematical error even though some attempt to say it does.

Is uniform motion the same as Simple Harmonic Motion (SHM) or is the second only a subset of the first?

[ema]

Hi every body..
At first,Many in the scientific community believe that time travel is highly unlikely.
Then, about what u said david, its right: theories like special and general relativity, suggest that suitable geometries of spacetime, or certain types of motion in space, may allow time travel into the past and future if these geometries or motions are possible.

Also:
What sinjin askin about is the differnce of time..Q7 answer correct as i see:

If one were able to move information or matter from one point to another faster than light, then according to special relativity, there would be an observer who sees this transfer as allowing information or matter to travel into the past. Additionally, faster than light travel along suitable paths would correspond to travel backward in time as seen by all observers. This results simply from the geometry of spacetime and the role of the speed of light in that geometry.


At last: what i say that this idea needs special mechanism..
yea , this way called wormholes :A proposed time-travel machine using a wormhole would (hypothetically) work something like this: A wormhole is created somehow. One end of the wormhole is accelerated to nearly the speed of light, perhaps with an advanced spaceship, and then brought back to the point of origin. Due to time dilation, the accelerated end of the wormhole has now experienced less subjective passage of time than the stationary end. An object that goes into the stationary end would come out of the other end in the past relative to the time when it enters.


All love
Ema

[humanbydefault]

Hi everyone!

I see you resucitated the same old contradictory argument of ftl... It's fascinating isn't it?
How could something could actually travel faster than its own ability to transfer information about itself to potential observers?
When you feel that the little "bug" start bothering you again inside your mind think of this way:
Einstein found that "c" is a constant in the universe. Otherwise radio waves, light and other type of radiation energies would propagate across the ether at different speeds... right?
Well James C. Maxwell postulated exactly the contrary: Light is just another type of electromagnetic radiation just as radio waves were. [Hertz work in radio]. Why would those conclusive results, proven many many times before, could be violated? Nonsense.
There is no FTL phenomenon at all. There is instead a REALTIVISTIC reception of information from different systems when they are made to co-relate in time.
It's about the geometry of space and the ability of light to "move" from one point in the cosmos to its final destination.
Tachyons?... I'd say that you were watching too much "Star Trek" lately...

HBD

[dleviwing]

ema;
Something often overlooked in collage is the strict understanding of the paradigm of science. Science is based only on our ability to measure. Absolute time is a concept that is universal. Since all objects and observers are moving, we are unable to produce a device that can represent this absolute time; thus we us physical devices called clocks that are synchronized to a reference motion such as the rotation of the earth. Physical objects and the perceptions of observers change as motion changes. Relativity is the mathematical geometry that corrects for these anomalies by using the defined measurement of the speed of light as a constant for all reference frames of motion.

[archetype]

Could someone explain to me, in very dumbed down terms, why faster-than-light speeds are associated with traveling back in time? In other words, sending something faster than light could theoretically send it back in time. I don't get this. I understand the theories of general and special relativity. I understand the basics of quantum mechanics. But whenever I try to read an explanation of why FTL could possibly lead to time traveling into the past, I get lost. And it's been really bugging me lately! Thanks in advanced, I appreciate any help I can get.

Maybe I can help. I am the Archetype.

When/if an object exceeds the speed of light, it will go directlty from whatever speed it's at to the speed 1/0, which is instantaneous motion. Oh, in case you didn't know, 1/0 is the absolute greatest value, meaning everything. Upon reaching 1/0, if the object continues accelerating its speed will become negative, meaning it will trip over into "negative" time, which is the whole left side of the # circle. This is all beautifully illustrated for you if you look at the number circle, which I myself have drawn for the first time in history, as far as I know http://s2.photobucket.com/albums/y9/...everything.jpg

The mathematical inversion of space and time hopefully allows you to understand the big bang and also what would happen if you sent something faster than the speed of light

Right now I am working on a device which extracts free energy from the expansion of time itself. Another way to say it is that my device will extract energy directly from 1/0, if I make it perfect (enough). This device will theoretically be able to travel faster than the speed of light, and I am going to use it to create a spaceship to travel space and time and take the most beautiful girl in the world with me to Mars. You probably think I am joking but the funniest thing is, I'm not! I am going to lead mankind to salvation so I hope you all are pumped. The government may try to stop me but if they do, you all are going to help us stop them. Are you with me?

For more information about the theory of 1/0 (i.e. everything) please read the thread that I posted, and stay tuned for my upcoming article. I have spoken. I am the Archetype.