I was going to complain about the windstorm blowing an unidentified flying object into my windshield today (probably a bird—the sucker was moving so fast I couldn't tell much), just when I thought I was finished having my car repaired. But it could have been a lot worse.
Oct. 15th, 2003
Not faster than light
Oct. 15th, 2003 11:45 pmAbout once a year or so, some news item pops up announcing that some experimenter has found a means of transmitting some kind of signal faster than light, thereby raising doubts about the speed-of-light limit in special relativity. Maybe 70% of the time, the story is distorted and the experimenters actually claim no such thing; they've got some sort of anomalous dispersion phenomenon that looks sort of like a thing going faster than light, but are perfectly aware that no information is being transmitted. The other 30% of the time, the investigator actually does claim faster-than-light information transfer, and invariably turns out to be somehow confused.
Given that, it's nice to see buzz about an experiment explicitly showing that an apparently faster-than-light pulse really doesn't transmit any information.
Given that, it's nice to see buzz about an experiment explicitly showing that an apparently faster-than-light pulse really doesn't transmit any information.