Can light in space travel faster than the speed of light?

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Offline yor_on

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What I'm asking is if light can do FTL, as observable to us, in 'Space'?
Isn't that only in a medium of some 'material' construction it does so?
And how can we prove such a thing without lights 'interactions'


And the reason was the article..Here
Yep, a new can of worms there, or as you Americans say.
"That's a horse of a totally different color."

But seriously, I've seen the same wording in a wiki?
On the other hand. I didn't succeed to make sense of that one either :)

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« Last Edit: 15/01/2010 13:14:00 by chris »
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Offline JP

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Re: Can light in space travel faster than the speed of light?
« Reply #1 on: 15/01/2010 09:41:50 »
"The cause of the anomalous dispersion for these pulses, according to the Brownsville astrophysicists, is the resonance of neutral hydrogen, which lies at 1420.4 MHz."

In other words, hydrogen is the medium that causes this effect.  Empty space shouldn't, since it doesn't cause dispersion.

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Offline Farsight

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Re: Can light in space travel faster than the speed of light?
« Reply #2 on: 15/01/2010 11:24:52 »
The FTL is an attention-grabber, yor_on. If you have a look at http://www.universetoday.com/2010/01/06/faster-than-light-pulsar-phenomena/ it says "Despite the large speed of the polarization current itself, the small displacements of the charged particles that make it up means that their velocities remain slower than light". Think "Mexican wave" - with a big enough stadium and some careful orchestrating, you can make it go faster than light. But nothing is actually moving faster than light. It's just a bunch of guys standing up and sitting down. 

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Offline yor_on

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Re: Can light in space travel faster than the speed of light?
« Reply #3 on: 15/01/2010 11:44:24 »
Thanks JP I missed that. I got stuck on the 'space thingy'
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