Re: [Phys-l] teaching different descriptions of "reality"

[Bernard Cleyet <bernardcleyet@redshift.com>]

Huh?

Just today (before reading the below) someone * at UCSC told me it was 
virtual photons.  To check up, the first response to ---  virtual 
photons coulomb  ---  was:


http://pages.globetrotter.net/srp/exp2000a.htm

Is this guy off his rocker?

* I was relating my discovery (pleasant) of J. Bernstein's "Intro to 
Cosmology" and how far behind I was in semi-current theory.

bc


Jack Uretsky wrote:

> 	The answer to your question is, "No".  The coulomb force, for 
> example, does not come from photon exchange.  EM waves interact with 
> matter through photon exchange.  The EM potential can be divided into 
> longitudinal and transverse parts; only the transverse part is quantized. 
> The longitudinal part gives the coulomb force.
> 					Regards,
> 						Jack
>
>
> On Wed, 19 Apr 2006, Brian Blais wrote:
>
>  
>
> > Jack Uretsky wrote:
> >    
> >
> > > Hi all-
> > > 	Brian Blais writes, in part, with respect to the trajectory of a
> > > thrown ball:
> > > > 5) quantum gravity: the ball exchanges gravitons with the Earth,
> > >      
> > >
> > > > which influe$> path
> > > >        
> > > 	Sorry, Brian.  This is a complete misconception.  "Gravitons"
> > > represent the interactions of gravitational waves which are far too weak
> > > to perceptibly influence the trajectory of a thrown baseball.
> > >      
> > thanks for the correction!  I knew I should have read more about it before
> > speaking...  :)
> >
> > But, the modern quantum description of interaction is entirely due to particle
> > exchange, yes?  or am I mistake on that too (it's been a while since I've looked at
> > it, and I don't think that I ever studied gravity with respect to these things).
> >
> > How does string theory describe this process of the ball going up and down in the
> > Earth's gravitational field?
> >
> >
> > 			bb
> >
> >
> >    
>
>