Re: [Phys-l] (no subject) neutrinos

[carmelo@pacific.net.sg]

Thanks! The question mark was used as an "inquiry approach" for some  
folks in the list.

Another possible answer for the earlier question is simply a "mirror  
reflection".
The light beam is "unstoppable".
The massive mirror is "unmovable".


Alphonsus

Quoting Bill Nettles <bnettles@uu.edu>:
> > bounces@carnot.physics.buffalo.edu] On Behalf Of carmelo@pacific.net.sg
> > Sent: Thursday, February 24, 2011 9:46 PM
> > To: phys-l@carnot.physics.buffalo.edu
> > Subject: Re: [Phys-l] (no subject)
> >
> > A neutrino may pass through a light year of lead and yet not be
> > stopped by any of the lead atoms. This does not mean that neutrino is
> > always 100% unstoppable?
>
> [Bill Nettles] Did you mean to have the question mark there?
>
> While it's true that the mean free path of a neutrino produced in a   
> typical beta decay is on the order of a light-year of lead, that   
> also means that out of population of neutrinos a large fraction of   
> that population DO interact and ARE stopped.