Timo A. Nieminen wrote:
> On Tue, 9 May 2006, Y.Porat wrote:
>
> > No Sir !
> >
> > if you put in  m=0
> > you still got    E=pc
>
> Given that (a) p=E/c has been experimentally verified to 0.1% at least,
> (b) E=pv is a known (for over 100 years) theoretical result for waves in
> general, and (c) E=pc has been a known theoretical result for light since
> 1884, why would this be a problem?

Because it leads to the following

E^2 = m^2.c^4 + p^2.c^2
E^2 = m^2.c^4 + E^2.c^2 / c^2
E^2 = m^2.c^4 + E^2
E^2 = 0^2.c^4 + E^2
E^2 = 0 + E^2
E^2 = E^2
E = E