Evening Reading
- Google controls your destiny and likes to party
- New and improved Light Ultra!
- Dead body controversy
- Supercomputer's key to the brain
- VoIP getting hotter
- Dude, sniff your TV
Lastly, yes.. like Maarten said 40yr old virgin is indeed amusing. I found myself chuckling much more than I expected. Once in a while there was a giggle too. Mostly chuckling though. Teehee!
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AbortedFetusChristi
replyLight that travels faster than the speed of light
mind -> blown-
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They were also able to create extreme conditions in which the light signal travelled faster than 300 million meters a second
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yeah... how can something be faster then itself? from what I heard, I take it light is a wave. how and why, seeing that the light source is probably not rocking back and forth in most cases, I don't know, neither what it (energy) is "made of", but who cares... anyway we have this wave there, right? and then this wave enters a different medium, like, from air into glass and back out, and it moves slower while inside the glass. soo... is there a lot of excess light in the glass, like, saved, buffered for a moment? then what if you insert a glass block into an existing beam of light... will the spot on the wall disappear momentarily while the light crawls through the glass?
I'm actually even more confused by radio waves... say you're flying in a straight line away from the other person while you two are talking over a walkie talkie... what happens to the radio waves? isn't the received information slowed down because every "unit" (great word to use in an analogous system) of the wave is sent from further away than the previous one and hence takes longer to reach the other radio? so you'd talk in slow-mo when you're flaying away really fast? is your wireless internet connection slower when you're in the concorde? let's not even get me started on the subject of flying towards something...-
What you're describing is an effect known as red shift. It's analogous to the Doppler effect you get with sound. For example, when a train is approaching you, it sounds really low, but as it gets closer, the frequency gets higher and higher until it passes you, and then recedes again. The frequencies of sound actually do what you're describing.
The same thing happens with light, except with light instead of sound. So things receding away from you are "shifted" towards longer frequencies, and things coming toward you are shifted towards shorter frequencies. This is known as "red shift" and "blue shift," respectively, because the frequncies of light go toward the red or blue side of the spectrum.
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It's most likely the precursor wave, which makes this old news, and it doesn't violate any known laws, though the implications of these experiments are still being studied and debated. Details in this article are curiously absent, but they do say that "only a portion of the signal is affected." That makes me think precursor.
Read here for more info on the precursor wave in an older experiment.
http://www.spie.org/app/Publications/magazines/oerarchive/july/jul00/lightlimit.html -
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Phase velocity is not the velocity of a phsical entity, it is a sort of virtual velocity, and it's not a big deal at all. I doubt anyone would make such a fuss over phase velocity. It's difficult to tell from the article though, due to the lack of detail, and that in itself raises a red flag.
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okay let me bust out some spacetime shit on your asses. Here's the deal: everything goes the speed of light. Einstein never wanted to call it theory of relativity someone else made that name up. Einstein wanted to call it Theory of Invariance. The invariance is EVERYTHING goes the speed of light through SpaceTime. So you have space x,y,z and you have time t. For light it never ages because it puts all its motion into space and 0 into time. For most other things they go through both time and space. This is why a person going really fast in a rocketship doesn't age as fast as someone on earth. He puts more motion into space than into time.
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if you're all space and no time, you age zero. if you're all time and no space, you're an old fart. case closed.
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