Anyone interested in Time Travel?

[Robes87GN]

Originally posted by tminer
Reverse time travel theoretically occurs when travelling faster than the speed of light.

Alledgedly, it has been done in the lab. Some sort of plasma based device that will transmit an electrical signal faster than the speed of light. They ran a signal into it and a conventional circuit in parrallel and the plasma signal was recieved at the other end before the conventional one.

I contend that no real time travel took place. Just that the plasma cicuit was faster than the electrical. One could accomplish the same thing by yelling into a nearby microphone and running the signal a distance to where a second microphone has been placed. Run the two signals into a dual trace scope and you will see that the signal from the mic closest to the yelling will be first. It travelled at the speed of light (electricity) whereas the other one travelled a distance at the speed of sound (yelling to distant mic). Did time travel occur? No, unless one wrongly assumes the speed of time (aka the actual maximum speed achievable) is the same as the speed of sound. And the fact that the speed of light has been surpassed would indicate that the speed of time is also faster than the speed of light. So no time travel.

Unless the plasma signal actually isn't faster than the speed of light, but rather travels through time and therefor only appears to be faster!

Tom

Like the movie Contact? Where Jodie Foster would have only aged 2yrs the entire like 50 years she was gone because she was travelling near or faster than the speed of light?

 

[ncgreg231]

I thought that Jodie Foster experienced a brief experience of a few hours, although she was never gone from the "world" for very long? Besides, she didn't really "travel" so much as she "wormholed" to wherever she went.

 

[tom h]

Originally posted by tminer
... Reverse time travel theoretically occurs when travelling faster than the speed of light.

Alledgedly, it has been done in the lab. Some sort of plasma based device that will transmit an electrical signal faster than the speed of light. They ran a signal into it and a conventional circuit in parrallel and the plasma signal was recieved at the other end before the conventional one...

Well, not exactly. The distinctions may seem arcane and technical, but the absoluteness of maximum speed of "information travel" = speed of light, was preserved. There was no "actual" faster-than-light travel.

" No thing goes faster than light "
http://physicsweb.org/article/world/13/9/3

"Experiment confirms that information cannot be transmitted faster than the speed of light"
http://physicsweb.org/article/world/16/12/3/1

An example of something can "appear" to move faster than light, but it cannot be exploited to transfer "information" faster than light :

..velocities greater than c can be observed. Suppose a lighthouse illuminates a distant shore. The rotating lamp moves quite slowly, but the spot on the opposite shore travels at a far greater velocity. If the shore were far enough away, the spot could even move faster than light. However, this moving spot is not a single "thing". Each point along the coastline receives its own spot of light from the lighthouse, and any information travels from the lighthouse at c [speed of light], rather than along the path of the moving spot. Such phenomena are described as the "motion of effects", and are not forbidden by [Einstein's theeory of] relativity.

 

[turbot2496]

Seems to me that if you believed it would be possible to go back in time(which I don't) then you would have to buy into the alternate reality stuff or else we would already have people that have time traveled back here and created all kinds of paradox's that would wreak all kinds of havoc. Now traveling into the future on the other hand could very well be possible in my opinion. In other words, I think Titor is full of crap. In addition you can't search for him in a phone book because he states that John Titor is not his real name.

 

[VADER]

I realized that about his name after further reading.

I don't believe it myself. I think it is merely someone trying to illustrate what the future could be like if we continue on our current path.

Of course, if we start having civil wars, I will make sure I am out of Jacksonville before 2015 since it is first target.

I did wonder about his space shuttle prediction, since recently it blew up.

 

[turbo buicks]

well damn!!! all this speed of light talk totally throws my faith in start trek being real out the window.


BTW, the BS flag still waves proudly.