faster than light and arriveing before you left

remember a while back when a few scientest sent light pulses faster than light?They claimed they arrived at the destination before they left(aka time travel).However wouldent it simply be that the signal from the sensors which only travel at the speed of light couldent keep up making it appear that they arrived before they left.It sounds like what they are saying is if you travel FTL you are traveling faster than time.for example if someone left earth for alpha centari (4.3 light years away) and traveled at 2 times the speed of light they would arrive at alpha centari in 2.15 years.Why is it assumed that light is a measurement of time and just because you got to point b before light could leave point A You got there before you left.This would only be true if light traveling at light speed got to point B before it left point A but if had FTL sensors we would see there was a tiny delay from when it left point a to when it got to point B.Am i making any sense here?

[Edited on 30-11-2003 by frostythesnowman]

Nonono....the light reached where it was meant to go 300 times faster.

The light pulse entered some form of gas....and as it just was getting in there....it moved 300 times faster than normal....and was out of there just about as soon as it got in. Meaning lgith went 300 times faster....time is still moving.....the light just moved 300 times faster than it usually did.

Originally posted by frostythesnowman
remember a while back when a few scientest sent light pulses faster than light?They claimed they arrived at the destination before they left(aka time travel).However wouldent it simply be that the signal from the sensors which only travel at the speed of light couldent keep up making it appear that they arrived before they left.It sounds like what they are saying is if you travel FTL you are traveling faster than time.for example if someone left earth for alpha centari (4.3 light years away) and traveled at 2 times the speed of light they would arrive at alpha centari in 2.15 years.Why is it assumed that light is a measurement of time and just because you got to point b before light could leave point A You got there before you left.This would only be true if light traveling at light speed got to point B before it left point A but if had FTL sensors we would see there was a tiny delay from when it left point a to when it got to point B.Am i making any sense here?

[Edited on 30-11-2003 by frostythesnowman]

ok, it took me over 7 mins. to make out what you're saying, advice: rephrase.....put all your jumbled thoughts together and pick one out at random, you're chucking heaps of questions for lack of a better topic, in other words?? you're doing this for the points
*shakes his head & mutters smthng rude*
Cyrus

Originally posted by DaRAGE
Nonono....the light reached where it was meant to go 300 times faster.

The light pulse entered some form of gas....and as it just was getting in there....it moved 300 times faster than normal....and was out of there just about as soon as it got in. Meaning lgith went 300 times faster....time is still moving.....the light just moved 300 times faster than it usually did.

for lack of a better topic to reply to

yes and no,
time did remain as it was, only photons have a speed limit, 3.00 x 10^8, after that, a breaking up process takes place.
collision theory states anti-matter can be obtained by accelerating particles at near-maximum speed, this is merely theoretical.
Cyrus

Would anyone happen to have any links relating to this?

EDIT:

Scientists have sent light signals at faster-than-light speeds over the distances of a few metres for the last two decades - but only with the aid of complicated, expensive equipment. Now physicists at Middle Tennessee State University have broken that speed limit over distances of nearly 120 metres, using off-the-shelf equipment costing just $500.

www.newscientist.com...

Is this the right one?

[Edited on 30-11-2003 by Paradigm]