Received from Isaac Marino Bavaresco at 09/23/11 14:23 UTC: >Em 23/9/2011 10:48, smplx escreveu: >> >> On Fri, 23 Sep 2011, IVP wrote: >> >>>http://www.bbc.co.uk/news/science-environment-15017484 >>>I think the neutrinos just get excited by a trip to Italy >>> >>>The figure I've seen is 20ppm faster than light. They allegedly arrived= =20 >>>60ns before light would have, with an accountable error of 10ns >>> >>>One scientist asked why neutrinos haven't been observed (for whatever=20 >>>reason) ahead of supernovae, which they should do by a significant time= =20 >>>period if at least one flavour of neutrino is 20ppm faster than light >>> >>>20ppm of 1 year is 10.5 minutes. Even 1ppm faster than light would be 30= s=20 >>>per lightyear distance >>> >>>Joe >> >> >>60ns measured between 2 points lets you plot one point on a curve. If you= =20 >>don't know what shape the curve is, assuming it's a straight line and=20 >>looking for other points on that line isn't going to get you anywhere :-) >> >>Regards >>Sergio Masci > > >The neutrinos traveled from Swiss to Italy inside rock (and perhaps magma)= =20 >in a straight line. For neutrinos that's easy. In the 60ns the light=20 >travels approximately 18m. > >My question is: Did they know the exact distance with a precision of a few= =20 >meters between two points separated by 732km? Both buried under hundreds o= f=20 >meters of rock? > >I'm sure they could not send anything else through the same path to=20 >compare. Another challenge would be the synchronization of the two clocks= =20 >at such distance. > >Perhaps they are simply using a distance which is not that precise. Until now, the Large Hadron Collider has been demolishing theories rather=20 than spawning new ones. That leaves me more inclined to use the results ju= st=20 obtained to recalculate the speed of light thru rock (etc) along the path=20 from Switzerland to Italy than to challenge Einstein. Supposing the speed measurements are confirmed beyond doubt, next must come= a=20 coherent theory explaining it, otherwise all we have is an unexplained=20 anomaly. I imagine the theorists are off and running already. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .