Light's most exotic trick yet: So fast it goes ... backwards?

[Doug]

"In the past few years, scientists have found ways to make light go both faster and slower than its usual speed limit, but now researchers at the University of Rochester published a paper on May 12 in Science on how they've gone one step further: pushing light into reverse. As if to defy common sense, the backward-moving pulse of light travels faster than light.
Confused? You're not alone. ................................... ." read the full article at http://www.spaceflightnow.com/news/n0605/14light/
So it seems that 'C' is not an absolute.

Doug

[robagar]

a pulse of light is not the same as light itself. Its like the spot of light you see when a lighthouse beam hits a cloud. If the cloud is far enough away, it can appear to move faster than the speed of light.

But,

the light itself is not going any faster, and
no information is transferredc still rules.

[josh]

Doug
I was just starting to get the hang of all this light stuff... But now..ill be back:confuse2:

[ving]

yup, light moving faster than light... makes perfect sense :screwy:

[Doug]

If a pulse of light 1 nanosecond duration were studied from a time frame of 10to the-3 picoseconds, would that pulse not be a solid beam of light
relatve-itly speaking :shrug:

best,
Doug