🚀 go-pugleaf

On Sep 13, 1:15 pm, "Y.Porat" <y.y.po...@gmail.com> wrote:
> On Sep 13, 1:37 pm, Pentcho Valev <pva...@yahoo.com> wrote:
>
> > On Sep 13, 12:19 pm, "Y.Porat" <y.y.po...@gmail.com> wrote in
> > sci.physics:
>
> > > > Porat 2 : is the speed of light in vacum constant ??
> > > > hanson : It depends.
>
> > > it depends on   nothing in vacum
>
> > Porat, you often claim that the photon is a particle with a mass. Then
> > its speed must depend on the speed of the light source mustn't it:
>
> > http://books.google.com/books?id=JokgnS1JtmMC
> > "Relativity and Its Roots" By Banesh Hoffmann
> > p.92: "There are various remarks to be made about this second
> > principle. For instance, if it is so obvious, how could it turn out to
> > be part of a revolution - especially when the first principle is also
> > a natural one? Moreover, if light consists of particles, as Einstein
> > had suggested in his paper submitted just thirteen weeks before this
> > one, the second principle seems absurd: A stone thrown from a speeding
>
> thank you Pentco for your interesting resond
> but please note:
>
> i am not all along with Einstein even with SR!!
>
> i am very sepective
> if einstein ever said that th e   photon has no mass
> i am not with that !!

The speed of any other particle with a mass varies with (1) the speed
of the emitting body and (2) the gravitational potential. So you
should specify your "selectivity" by saying e.g. the following:

"The photon has a mass but its speed varies with neither the speed of
the emitting body nor the gravitational potential."

Or, if you wish your statement to be more consistent with Divine
Albert's camouflage, you could say:

"The photon has a mass but its speed does not vary with the speed of
the emitting body. However it varies with the gravitational
potential."

And, of course, then you should explain why the photon has found it
suitable to behave in such a strange way.

Pentcho Valev
pvalev@yahoo.com