The Alchemist on 18/10/2011 at 15:42
Can instantly tell non-Legacy (lol) TTLG users apart because they call me The Alchemist. :(
DDL on 18/10/2011 at 15:50
I was just being polite!
Way to make a guy feel welcome. :mad::mad:
[insert obligatory 'u sayin german' reference]
(also, I'm mostly I guess the "DX-version" of a thiefgen dweller, so hey :-/)
Trance on 18/10/2011 at 18:07
Quote Posted by The Alchemist
Can instantly tell non-Legacy (lol) TTLG users apart because they call me The Alchemist. :(
What
should you be called?
june gloom on 18/10/2011 at 18:17
arm-flailer ;)
demagogue on 18/10/2011 at 18:41
The Alcoholic
zombe on 18/10/2011 at 21:56
Quote Posted by DDL
I was quite surprised to discover that GPS satellites weren't geostationary, personally.
Try to be geostationary at the poles ;)
Pyrian on 18/10/2011 at 23:10
(
http://www.sciencenews.org/view/generic/id/335309/title/Critics_take_aim_at_fast_neutrinos) Boston University is claiming that, if this were correct, the particles should have given off (
http://en.wikipedia.org/wiki/Cerenkov_radiation) Cerenkov radiation. ...I don't see why, though. Cerenkov radiation is sort of like a sonic boom in polarization. It's caused by charged particles moving through a medium faster than light does in that same medium. Setting aside the fact that neutrinos aren't even charged, to get any sort of comparable effect they have to interact with the medium they're passing through (possible through the weak force), when the whole issue with neutrinos is that they mostly do not.
demagogue on 19/10/2011 at 01:05
I don't know about it myself, but my trusty layman's book said Cherenkov radiation is exactly the way they often detect neutrinos, like the neutrino telescope in Lake Baikal. I remember because it was described the way you just did, it's like a sonic boom from a particle traveling faster than the speed of light in water which creates a bluish light cone you can see on film.
Edit: Looking back at it... Ah, because the neutrino interacts with the water molecules to create a muon or electron that has the effect. They know it's from a neutrino when the cone is facing *up*, which means it came from a cosmic ray that had to go through the earth.
I'm assuming they're making a similar argument here. If the neutrinos were consistently traveling faster than light 10K's of times, you'd expect some of them would interact with the dirt or air or whatever atoms & create electrons or muons having Cherenkov radiation with cones aligned with the same line-of-sight as the incoming neutrinos.
Pyrian on 19/10/2011 at 02:15
The Boston U. claim isn't that the impacted particle in the detector would produce Cherenkov radiation just past the point of impact - that's perfectly normal - but rather that the neutrino itself would produce a comparable sort of radiation en route.
