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Sending light so fast it goes backwards...

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Sending light so fast it goes backwards... Science forum discussing scientific research and developments in artificial intelligence, astronomy, cybernetics, physics, paleontology, alternative energy sources, and supercomputers. Comment on the newest breakthroughs.

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Old May 12th, 2006, 12:58 PM
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Sending light so fast it goes backwards...
This is mind-bending, to say the least-- these guys have sent a light pulse down a fiber so fast, it actually moves backwards-- time to break out the relativity texts again...

Light's Most Exotic Trick Yet: So Fast it Goes ... Backwards?

Keep in mind that Einstein's speed limit, c, is for light travelling through a vacuum... it is possible to move a particle faster than the normal speed of light through a specific medium, the action causes Cerenkov radiation.

It seems to me that this effect is related to the optical illusion created by an object moving at relativistic speeds as seen by an outside observer as described in Special Relativity.
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Old May 12th, 2006, 04:02 PM
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Wow. I'm still caught on how they're getting light to move faster in a medium than a vacuum, when it should have a higher optical density.



I'll have to read this better later.
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Old May 12th, 2006, 04:15 PM
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thats pretty sweet to say the least. now, if they could only get the flux capacitor thing working.
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Old May 12th, 2006, 06:44 PM
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We're studying Einstein's theory right now-- I'll definately have to bring that article in.

Likewise, what amazes me most is that he succeeded in altering the speed of light, especially making it faster.
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Old May 15th, 2006, 01:30 AM
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very strange stuff. im currently working on how to change my avatar, thats even more complicated.
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Old May 23rd, 2006, 03:37 PM
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