Jeffâ–²Relf wrote:
So ( to recap ) you don't know if Einstein explicitly said
something like: “ Photons have no rest mass. �.
I can't believe he was silent on this matter.

Look into his writing on GR. I'm pretty sure he said that light follows
a null geodesic -- that is, for instance, implicit in his computation of
the deflection of light by the sun. It directly follows from Maxwell's
equations and basic GR. Any object that follows a null geodesic
inherently has no mass.

Worrying about what this or that eminent scientist said is of little
use, ESPECIALLY when said scientist died well before the modern
vocabulary we use today was established.


Tom Roberts

On Feb 23, 5:42 pm, Tom Roberts wrote in
sci.physics:
Jeff$B"%(BRelf wrote:
So ( to recap ) you don't know if Einstein explicitly said
something like: " Photons have no rest mass. ".
I can't believe he was silent on this matter.

Look into his writing on GR. I'm pretty sure he said that light follows
a null geodesic -- that is, for instance, implicit in his computation of
the deflection of light by the sun. It directly follows from Maxwell's
equations and basic GR. Any object that follows a null geodesic
inherently has no mass.

Worrying about what this or that eminent scientist said is of little
use, ESPECIALLY when said scientist died well before the modern
vocabulary we use today was established.

Tom Roberts

But Roberts Roberts modern vocabulary is much more idiotic than
Einstein's (after 100 years of intellectual selection in Einstein
criminal cult):

http://groups.google.com/group/sci.p...b971595bf0fe4?

http://groups.google.com/group/sci.p...ed28b53a1edd8?

Pentcho Valev

It takes lots of effort to communicate sometimes,
too much effort for some people here.

I've no shortage of reading material;
if someone doesn't suite my tastes I just skip past them,
instead of calling them terminal idiots.

If the fields of the photon are in a near perfect vacuum,
how much energy was used to produce ( and maintain ) this vacuum ?

Empirically, there are no error bars
to your ( ahem ) metaphysical statement: “ Light has no mass. �;
100 years form now, the error bars might be reduced.

On Feb 20, 7:32 pm, Jeff$B"%(BRelf wrote:
" e ^ 2 == ( m * c^2 )^2 + ( p * c )^2 " ( c-style notation ),

Explain your retarded Francish gapsom punctuative notation.

Zero is a metaphysical number, wholly unphysical, not empirical.
Empirical numbers have error bars, verified by third parties.
Are gamma-rays slower than microwaves ? I wonder.

That is, is the "vacual" impedanse quantally-dependent? Does the
background drag on gamma waves' virtual bodies? Isn't it in doubly-
special relativity?