Can you travel in time?

[Mohan.C]

Although they are in top set with me they think of me as a nerd which I find rather hippocritical because they themselves could unerstand it if they tried. To Mohan.

Well, you are creative, so I guess that doesn't make you a nerd...

[neutralino]

Hi neut, whatever I know comes from this blog...

So yes, according to that a tachyon must have imaginary rest mass.

By the way, that just looks like it's been lifted, in part, from wikipedia.

[Mohan.C]

So yes, according to that a tachyon must have imaginary rest mass.

By the way, that just looks like it's been lifted, in part, from wikipedia.

Even, I thought it was lifted from Wikipedia, but I found it here, so I gave this link.

Another question neut, Hawking talks about something called the arrow of time, now I know it is pointing to the future, or the flow of time or something.
What my question is, if we travel faster than the speed of light, we would be going to the past, but, what happens if we travel faster than the speed of light backwards, like in opposition to the arrow of time, would we go to the future? I just thought this because time is also considered as a dimension, there would be negative co ordinates for time also. Its weird I know, but just suppose.

[Max™]

We are not moving along with the flow of time.

Our perspective of time is panning through that direction.

The past doesn't stop being there because you aren't looking at it, nor does the future wait to exist until you look at it.

[Mohan.C]

Max I agree, that is why I said "suppose", it was just a thought, so what would happen?

[Max™]

Which direction do you mean when you say backwards?

Up/Down
Left/Right
Forwards/Backwards
Upstream/Downstream (past/future)

If you move somewhere along an FTL path, you could arrive somewhere before you yourself would have claimed a plane of simultaneity with that location and your arrival.

Then you could return along another FTL path, and complete a closed timelike curve.

This would put you further up your worldline than you started.

No paradox other than the removal of energy from one period of time to another, that is the real violation there.

Poking your past-self in the eyes, now that's just comedy.

[PoPpAScience]

Even, I thought it was lifted from Wikipedia, but I found it here, so I gave this link.

Another question neut, Hawking talks about something called the arrow of time, now I know it is pointing to the future, or the flow of time or something.
What my question is, if we travel faster than the speed of light, we would be going to the past, but, what happens if we travel faster than the speed of light backwards, like in opposition to the arrow of time, would we go to the future? I just thought this because time is also considered as a dimension, there would be negative co ordinates for time also. Its weird I know, but just suppose.

Mohan I wrote this 9 posts ago:

"Time travel into the past defies Logic! Yes it can be done in mathematical equations for fictional entities. But to recreate the past one would have to force the Universe to put all substance back to where it was on that certain moment one is trying to visit.

The Human perspective, and Human measurement of the passage of Time, is strictly a generalization. "Motion" of "Substance" gives us a view of "The flow of Time". No human can return all "Motion" of "Substance" back to where it was last second, let alone 2 seconds ago."


Maybe Neutralino could respond to both of our opinions? I personally miss his responses since he semi-retired from this forum.

How a time piece responds to the physics of "Motion", is not a perfect science of "The flow of Time". "Time" is one directional, and is not responsive to Human motion, no matter how fast the Human travels.

"Time as a "Dimension", allows "Motion" to be.

[Max™]

Time is not one-directional.

Bodies with mass interact with time in a specific direction.

[Mohan.C]

According to me, time is just a measurement of motion, I don't know much about its direction.....

[dleviwing]

Joshua;
Nothing can be done to influence the rate at which time passes. We can only influence the “measurement of time” and thus the perception of it. Relativity is a subjective theory that is confused with objective components such as the influence of motion on the physical dimensions of objects. Making a clock run slow does not change the rate of time; just the instrument used to measures it.

Max;
YES it is.