|Jan18-08, 03:56 PM||#1|
light and negative-speed
Alright. I think, perhaps, I might have a handle on this. Maybe. I read this article a few months ago, but if someone could explain it a little better I'd appreciate both your effort and candor.
My question is, how accurate is this? Is it possible FTL as it purports, a circumvention of relative limitations, or merely another victim of sensationalist reporting?
Insofar as it's [the pulse] not being able to carry information, what exactly does 'information' mean in this context? The information describing this pulse as 'light' for instance, or that of a signal transmission, or...
|Jan19-08, 06:20 AM||#2|
As a more easily understandable toy model imagine a train full of people. The train starts and people are distributed evenly all over the train. Now all the people start going to the back of the train with different speeds. You will notice, that the position of the "peak" of the number of people changes. Depending on the speed of the train, this position might even move backwards. Nevertheless this has absolutely no influence on the speed of the train.
|Jan21-08, 10:56 PM||#3|
Sorry, been a while since I’ve gotten the chance to come back here. Wasn’t expecting to find the thread moved, but perhaps it does fit a bit better beneath the classical umbrella.
To point some out [emphasis mine]:
It would explain the discrepancy in speed, but...
Choosing to avoid the awkwardly posed ‘funhouse mirror’ explanation near the end of the article, I’ll instead bring into relief the descriptions of the four-stage graphic that illustrates the process.
:WARNING, RECKLESS LOGIC JUMPS AHEAD:
Hypothetically speaking, and giving the reporter’s journalistic integrity a big benefit of the doubt here-
What if somehow the interior of the fiber [no matter the ‘actual’ speed of the pulse through it] is akin to a superfluid, where all ‘quanta’ throughout the ‘fluid’ are acting in unison- a ‘one for all, and all for one’ kind of thing.
Could it, or a phenomen like it, account for the reported propagation of the ‘same’ pulse at the exiting end of the fiber as well as the ripple-like reverberation of the split-pulse backward into the initial?
Could this as well, account its exiting speed relative to the speed of its twin reference travelling outside the fiber?
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