Re: virus: Quantum TT
David Leeper (dleeper@gte.net)
Mon, 27 Aug 1956 20:53:16 +0000
Schneider John wrote:
>
> David Leeper wrote:
> > : > Tadeusz Niwinski wrote:
> > : > >
> > : > > David Leeper wrote:
> > : > > >Quantum Mechanics shows that even the speed of
> > : > > >light is not absolute.
> > : > >
> > : > > How?
> > >
> > : > Uncertainty Principle (or Feynman's "Arrows", if you prefer).
> > :
> > : The uncertainty principle has nothing to do with the speed of
> > : light.
> >
> > Measuring the speed of a photon (light) is subject to the
> > Uncertainty Principle.
>
> That's not quite how it works: the uncertainty principle relates
> pairs of observables. Even though knowledge of both speed and
> location is subject to the uncertainty principle, it is still
> the case that the speed of a photon may be determined with
> arbitrarily small uncertainty (in theory).
The photon receives no special treatment in QM. If we know
its location with 100% certainty, we are 100% uncertain of it's
speed, like every other particle.
>From "QED" by Richard Feynman:
"You found out in the last lecture that light doesn't only
go in straight lines; now, you find out that it doesn't go
only at the speed of light!"
--
David Leeper dleeper@gte.net
Homo Deus http://home1.gte.net/dleeper/index.htm
1 + 1 != 2 http://home1.gte.net/dleeper/CMath.html