time reversal

[mwmorph]

is this possible even theritically? technically if you were say going to 1.1 lightspeed, then wouldn't time go from foward to stop to backward?

also, if it is possible, why arent we bombarded form tourists form the future?

 

[Anubis08]

Nope. First you could never attain that speed, and second, if we could theoretically in the future come back, we would hopefully be smart enough not to because of the catastrophic impact it might have. After all, short of mass changing into energy, we have never seen matter created or destroyed. You would have to create matter in our time and destroy it in your own to go back in time. That could hsve some very dire consequences as well as the loop paradox where in one spot in time you will forever maintain that loop. Very complex and doubtful.

 

[GoHAnSoN]

theoratically possible, technically not feasible. end of story ?

 

[deveraux]

Originally posted by: GoHAnSoN
theoratically possible, technically not feasible. end of story ?

 

[ggjb]

first off you would need a flux capacitor, a delorean, and would need to reach 88mph to travel back in time.

 

[f95toli]

The answer is that we don't know, it might be possible.

A slightly longer answer is that if worm-holes exists it should (as far as we know) theoreticaly be possible.
Believe it or not but this is actually an area of active research, the important point is of course not if it is technically possible or practical but wheter it is possible in principle; knowing the answer to that question would tell us a lot about the properties of time.

 

[kotss]

Originally posted by: f95toli
The answer is that we don't know, it might be possible.

A slightly longer answer is that if worm-holes exists it should (as far as we know) theoreticaly be possible.
Believe it or not but this is actually an area of active research, the important point is of course not if it is technically possible or practical but wheter it is possible in principle; knowing the answer to that question would tell us a lot about the properties of time.

Yes, but the limit to theory is that you are limited to travelling no farther back in time then when the
wormhole was actually created.

 

[f95toli]

True, sorry that I forgot to mention that.

 

[Malak]

No, you cannot go back in time. Time does not exist. There is nothing 2 seconds from now in either direction of our measurement. You cannot go to what does not exist.

 

[kotss]

Originally posted by: malak
No, you cannot go back in time. Time does not exist. There is nothing 2 seconds from now in either direction of our measurement. You cannot go to what does not exist.

How is it, that time does not exist. Please explain in detail.

 

[Malak]

It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

 

[ghost03]

There is one way that is theoretically possible. Construction of a wormhole theortically would allow you to go back in time as far as the creation of the wormhole. Construction of a wormhole of course would require many more resources than we are capable of, and probably won't be capable of for a long time.

 

[kotss]

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

So according to your theory, by the time I type each letter in my post, the single moment of reality has
gone by and therefore the entire contents of the post have violated the reality rule. And the moment I
hit the reply to topic button my post no longer exists because that single moment of reality that it existed
in ceased to exist. If it ceases to exist then how can I send it?

 

[mwmorph]

so waht you are saying is tha either
a)it is impossible
or
b)it canbe possible, but only to a extent and we are not capable to use it now.
hmm... thats a thinker.

 

[Cattlegod]

no, everything that has existed in the past exists now, and everything that exists in the future exists now. people often make the mistake of looking at time like it is a large novel where each page represents a moment in time. time is more of a rubbery surface with waves and spikes in it. think of it this way, something at the top of one of the rubbery spikes would be in the future, and someone on a lower part of the surface is in the past relative to the person in the future. Infact, they both exist in the same space and same time "plane". you and myself do not reside in the same "time" you may be in the future compared to me, or I you, however we are in the same time plane.

think of it this way, say someone travels close to the speed of light for an extended time. time slows for him and everything else speeds up. he ages 1 year, his friends age 50, he then goes and talks to his friends who are now 50 years older. who is in the future? who is in the past? the answer is neither, they exist in the same time.

 

[302efi]

Originally posted by: ggjb
first off you would need a flux capacitor, a delorean, and would need to reach 88mph to travel back in time.

 

[DrPizza]

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

Not sure what you're trying to say, but we already know we can travel into the future, and it's already been done. All thanks to Albert Einstein (and others)



Now, this is what's bothering my mind at the moment... we know that the earth is whizzing around the sun at some phenomenal speed... and the solar system is zipping around the galaxy and will be there in a few 10's or 100's of billion years, or however long it's supposed to take... and the milky way is cruising through the universe...

If we travel faster than the earth, for instance do a few laps in the space shuttle, while 100 hours 5 minutes and 6.214 seconds have elapsed for us on the space shuttle, 100 hr, 5 min, 6.219 seconds have elapsed on the earth, putting us squarely .005 seconds into the future. (I, of course, just made up the numbers.. I don't actually know what the scale of the time difference in experiments actually was (except it was a pretty small amount of time)

Suppose though, instead, we hopped aboard our starship, headed for the sky, figured out which way the earth was moving, relative to the universe, and just kinda attempted to stay in one spot (relative to the universe) - not that that makes sense entirely, but I think you get the idea.. wouldn't time be travelling faster for us relative to time on the earth - thus we'd end up in the past by a second or so??

 

[jagec]

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

Don't call a hypothesis a theory until you can back it up...

 

[Cattlegod]

Originally posted by: DrPizza

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

Not sure what you're trying to say, but we already know we can travel into the future, and it's already been done. All thanks to Albert Einstein (and others)



Now, this is what's bothering my mind at the moment... we know that the earth is whizzing around the sun at some phenomenal speed... and the solar system is zipping around the galaxy and will be there in a few 10's or 100's of billion years, or however long it's supposed to take... and the milky way is cruising through the universe...

If we travel faster than the earth, for instance do a few laps in the space shuttle, while 100 hours 5 minutes and 6.214 seconds have elapsed for us on the space shuttle, 100 hr, 5 min, 6.219 seconds have elapsed on the earth, putting us squarely .005 seconds into the future. (I, of course, just made up the numbers.. I don't actually know what the scale of the time difference in experiments actually was (except it was a pretty small amount of time)

Suppose though, instead, we hopped aboard our starship, headed for the sky, figured out which way the earth was moving, relative to the universe, and just kinda attempted to stay in one spot (relative to the universe) - not that that makes sense entirely, but I think you get the idea.. wouldn't time be travelling faster for us relative to time on the earth - thus we'd end up in the past by a second or so??

If this were the case, you wouldn't be in the past, but at a different point in the future, and the earth would be slightly more in the future.

 

[deveraux]

Originally posted by: Cattlegod

Originally posted by: DrPizza

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

Not sure what you're trying to say, but we already know we can travel into the future, and it's already been done. All thanks to Albert Einstein (and others)



Now, this is what's bothering my mind at the moment... we know that the earth is whizzing around the sun at some phenomenal speed... and the solar system is zipping around the galaxy and will be there in a few 10's or 100's of billion years, or however long it's supposed to take... and the milky way is cruising through the universe...

If we travel faster than the earth, for instance do a few laps in the space shuttle, while 100 hours 5 minutes and 6.214 seconds have elapsed for us on the space shuttle, 100 hr, 5 min, 6.219 seconds have elapsed on the earth, putting us squarely .005 seconds into the future. (I, of course, just made up the numbers.. I don't actually know what the scale of the time difference in experiments actually was (except it was a pretty small amount of time)

Suppose though, instead, we hopped aboard our starship, headed for the sky, figured out which way the earth was moving, relative to the universe, and just kinda attempted to stay in one spot (relative to the universe) - not that that makes sense entirely, but I think you get the idea.. wouldn't time be travelling faster for us relative to time on the earth - thus we'd end up in the past by a second or so??

If this were the case, you wouldn't be in the past, but at a different point in the future, and the earth would be slightly more in the future.

This is correct as you are travelling relative to earth and the moment you run/walk or have any relative motion whatsoever to the ground, you move slightly forward in time, and as Cattlegod has said, you still are on the same time plane.

From what I know of pure relativity, speed of light is a limit and it works both ways. Particles already travelling faster than light cannot slow down below the speed of light and particles below the speed of light cannot speed up above the speed of light. Relativity does not say that particles above the speed of light does not exist. Theoretically, if you are already faster than the speed of light, you do not go "forward" in time but instead your "forward" would be our "backward" i.e. travelling back in time.

And time definitely does exist since the 2nd law of thermodynamics has already provided an arrow in time, hence a clear distinction between past and future. Oh, and another consequence of time not existing is that relativity would be wrong, as it relies on the time being the 4th dimension.

I haven't done relativity in a long time, so if some of what I said is wrong, please forgive me.

 

[r00tcause]

Originally posted by: mwmorph
is this possible even theritically? technically if you were say going to 1.1 lightspeed, then wouldn't time go from foward to stop to backward?

also, if it is possible, why arent we bombarded form tourists form the future?

No, it isnt possible and it never will be.

1.1 light speed isnt possible and it never will be. (directly)

Hawking theorizes that time travel may be possible but only from the point in which it is invented and outlines a possible method that would allow a wormhole creation from time A in the past to time B in the future that both parties could pass through. This would mean those in the future could travel back to the time the wormhole was created and no farther.

I disagree with Hawking. It wouldnt be the first time.

 

[imported_jb]

the answer is no.
i'd like to add that all you need to send back in time is data. just some 1's and 0's, on's and off's. there or missing. not a spaceship.

 

[kotss]

Originally posted by: mwmorph

This is correct as you are travelling relative to earth and the moment you run/walk or have any relative motion whatsoever to the ground, you move slightly forward in time, and as Cattlegod has said, you still are on the same time plane.

From what I know of pure relativity, speed of light is a limit and it works both ways. Particles already travelling faster than light cannot slow down below the speed of light and particles below the speed of light cannot speed up above the speed of light. Relativity does not say that particles above the speed of light does not exist. Theoretically, if you are already faster than the speed of light, you do not go "forward" in time but instead your "forward" would be our "backward" i.e. travelling back in time.

And time definitely does exist since the 2nd law of thermodynamics has already provided an arrow in time, hence a clear distinction between past and future. Oh, and another consequence of time not existing is that relativity would be wrong, as it relies on the time being the 4th dimension.

I haven't done relativity in a long time, so if some of what I said is wrong, please forgive me.

Let me know where you heard of particles going faster than the speed of light. I would be much
interested. The only thing I have ever heard of was the Tachyon, but that has since faded from most
modern theories. Most accounts of relativity I have read, never mention anything about FTL particles.
The only thing I know that has been considered to be travelling backward in time is anti-matter.

 

[Malak]

Originally posted by: DrPizza

Originally posted by: malak
It is a measurement of reality created by man. It isn't real. Reality only exists at a single moment, now.

Not sure what you're trying to say, but we already know we can travel into the future, and it's already been done. All thanks to Albert Einstein (and others)

No you can't.

 

[Malak]

Let me get a little more detailed here.

First off, travel is an inappopriate term. The past and future are not destinations that exist. You can't "go" to them.

Secondly, there is a way to arrive in your future with it seeming like you traveled to the future, but in reality you aren't. It's not so much a matter of going anywhere or speed, it's a matter of encapsulating a certain point in space and stopping time. Time all around you moves still so once you start time in that point again, you are in the future. But it's not travel, it's not going anywhere, and it's still not possible either. You can still freeze yourself the old fashioned way.

Journeyman Project anyone?