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RE: Neutrinos still travel faster than light
November 19, 2011 at 10:20 pm
(This post was last modified: November 19, 2011 at 10:25 pm by Norfolk And Chance.)
(November 19, 2011 at 12:19 pm)IATIA Wrote: Stephanie Pappas, LiveScience Senior Writer Wrote:If the neutrinos are actually going faster than light, though, it might be possible to use them to communicate with the past, Lloyd (Seth Lloyd, a physicist at the Massachusetts Institute of Technology) said. You could send off a faster-than-light message to someone moving at a rapid velocity with respect to you. They could then bounce the faster-than-light message back, and it would arrive before the signal you sent to them.
Surely if you can travel faster than light from a to b, you are still taking some time to travel there then travel back. And some time is more than no time at all.
I'm not sure how exceeding the speed of light could mean you'd receive the answer to your message before you even sent it. Because before you press the button you are at "0". For the answer to arrive before you sent the message then the message would have to take less than no time to get there and back - and as far as I can see, exceeding the speed of light does not mean you are beating time, only light.
Surely the only thing that could happen is that the message could arrive back before you could see it.
I often thought in the past that if you travelled back from a star faster than light (if it were possible to do so in a linear motion, rather than wormholes, bending spacetime etc), you could land, pull up a deckchair and watch the image of yourself landing later.
You are currently experiencing a lucky and very brief window of awareness, sandwiched in between two periods of timeless and utter nothingness. So why not make the most of it, and stop wasting your life away trying to convince other people that there is something else? The reality is obvious.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 10:55 am
(November 19, 2011 at 10:20 pm)Norfolk And Chance Wrote: exceeding the speed of light does not mean you are beating time, only light.
That would be pretty much my understanding of it.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 11:19 am
(November 20, 2011 at 10:55 am)Napoleon Wrote: (November 19, 2011 at 10:20 pm)Norfolk And Chance Wrote: exceeding the speed of light does not mean you are beating time, only light.
That would be pretty much my understanding of it.
Are you saying star trek lied to me!!!! 
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RE: Neutrinos still travel faster than light
November 20, 2011 at 11:21 am
At the speed of light, time stops, i.e., a photon is never 'aware' of it's existence. Faster than the speed of is now a negative time. If fast enough, the results will appear before the action.
Speed of light and causality
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RE: Neutrinos still travel faster than light
November 20, 2011 at 11:26 am
(November 20, 2011 at 11:21 am)IATIA Wrote: At the speed of light, time stops, i.e., a photon is never 'aware' of it's existence. Faster than the speed of is now a negative time. If fast enough, the results will appear before the action.
Speed of light and causality
Interesting theory but how can it be tested?
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RE: Neutrinos still travel faster than light
November 20, 2011 at 11:42 am
(November 20, 2011 at 11:26 am)downbeatplumb Wrote: (November 20, 2011 at 11:21 am)IATIA Wrote: At the speed of light, time stops, i.e., a photon is never 'aware' of it's existence. Faster than the speed of is now a negative time. If fast enough, the results will appear before the action.
Speed of light and causality
Interesting theory but how can it be tested?
IF the neutrinos are traveling FTL, then if the distance is shortened enough, we should see the neutrinos before they are sent. The time frame we would be working with in this case is quite short and it would be difficult at best. I personally believe that there is a 'clock' error in the experiment and the neutrinos are traveling at the speed of light.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 12:25 pm
(November 20, 2011 at 11:42 am)IATIA Wrote: I personally believe that there is a 'clock' error in the experiment and the neutrinos are traveling at the speed of light.
Agreed. There still remain a number of other issues that need to be ruled out before we start running around screaming about toppling special relativity - which, as has been pointed out before, this doesn't necessarily do.
Also, with no demeaning intended for the team, I would always be very cautious of accepting the results of findings tackling issues at the very boundaries of basic physics that were taken and written within a time frame of a month and a half. That doesn't give a whole lot of time for cautious scrutiny, IMHO.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 12:51 pm
(November 20, 2011 at 11:21 am)IATIA Wrote: At the speed of light, time stops, i.e., a photon is never 'aware' of it's existence. Faster than the speed of is now a negative time. If fast enough, the results will appear before the action.
Speed of light and causality
So in effect if you go faster than light you go faster than time? Maybe that theory is flawed?
You are currently experiencing a lucky and very brief window of awareness, sandwiched in between two periods of timeless and utter nothingness. So why not make the most of it, and stop wasting your life away trying to convince other people that there is something else? The reality is obvious.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 12:55 pm
(November 20, 2011 at 12:51 pm)Norfolk And Chance Wrote: So in effect if you go faster than light you go faster than time? Maybe that theory is flawed?
No, that's not what the theory says. If you go faster than light, time (for you) travels in reverse. Over a short enough distance, if you travelled faster than the speed of light, you'd arrive at your destination before you left your source.
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RE: Neutrinos still travel faster than light
November 20, 2011 at 1:22 pm
So time would go in reverse for me but what about relative to the observer?
You are currently experiencing a lucky and very brief window of awareness, sandwiched in between two periods of timeless and utter nothingness. So why not make the most of it, and stop wasting your life away trying to convince other people that there is something else? The reality is obvious.
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