[ExI] Faster than light??
pharos at gmail.com
Fri Sep 23 11:00:22 UTC 2011
On Fri, Sep 23, 2011 at 11:40 AM, Giulio Prisco wrote:
> Modern physics already acknowledges FTL _correlations_ (EPR quantum
> entanglement), but according to current theories these cannot be used
> to transmit actual information.
Ethan Siegel points out that the experiment has already been done on a
far larger scale and found no FTL effect.
Supernova 1987A, which took place in the Large Magellanic Cloud
168,000 light-years away.
This supernova was discovered, optically, on February 24, 1987. About
three hours earlier, 23 neutrinos were detected over a timespan of
less than 13 seconds. The reason for the 3 hour delay? When the core
of a star collapses (in a type II supernova; see here), most of the
energy is radiated away in the form of neutrinos, which pass freely
through the outer material of the star, while the emission of visible
light occurs only after the shock wave reaches the stellar surface.
Even if you assume that the light and neutrinos were created at the
same time, but the visible light moved at c and the neutrinos moved
faster than light, which is why they got here first, know what value
you'd get for the speed of these neutrinos?
1.0000000020 c, which is inconsistent with the results from the OPERA
So some reservations about the FTL effect should be held pending further data.
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