On Saturday, July 6, 2019 at 2:22:40 AM UTC+3, Tom Roberts wrote:
> On 7/5/19 5:05 PM, poraty4@gmail.com wrote:
> > On Friday, December 22, 2017 at 8:13:21 AM UTC+2, 44so...@gmail.com wrote:
> >> Local Curvature of Space
> >> According to Einstein’s theory of general relativity, massive objects warp
> >> the spacetime around them, and the effect a warp has on objects is what we call gravity.
> >
> > ==================================> > (:-)
> > if so which is the active part there ??
> > space or mess ????
> > you say
> > mass ** is wrapping ''(mass is warped '' )
> > it means that the active entity
> > is ....... mass!!!
> > and that s it!!! full stop!!
>
> No, that is NOT it. The "source" of curvature in GR is the full
> energy-momentum tensor, not just mass. So even massless phenomena such
> as electromagnetic fields and waves
===============================electromagnetic field
has no mass """"????

you look like Baron Munchausen
that was pulling himself from the mud
by puling up himself out of mud by pulling his booth straps up
in other words
ie
correcting his mistake by by using another mistake

Now listen carefully to your old friend
WE CANNOT DETECT ***ANY OBJECT***
IF IT HAS NO MASS !!!
TIA
Y.P
=================
just remember who told it to you
the first time ….
=================

can generate spacetime curvature,
> and thus gravity.
>
> Tom Roberts

On 7/26/20 4:14 AM, margaretporat@gmail.com wrote:
> On Saturday, July 6, 2019 at 2:22:40 AM UTC+3, Tom Roberts wrote:
>> The "source" of curvature in GR is the full
>> energy-momentum tensor, not just mass. So even massless phenomena such
>> as electromagnetic fields and waves
> ================================
> electromagnetic field
> has no mass """"????

Yes. In classical electrodynamics it is quite clear that the EM field is
massless. In QED, the theory assigns zero mass to photons, and the
experimental upper bound on the photon mass is 1E-18 eV, a fantastically
tiny upper bound.

> WE CANNOT DETECT ***ANY OBJECT***
> IF IT HAS NO MASS !!!

So you claim, and keep repeating, without any justification whatsoever.

I point out that we do indeed detect photons, even though they
presumably have zero mass.

I also point out that we detect sound waves, waves on the beach, and
many other types of waves, all of which CLEARLY have no mass -- they are
just specific kinds of synchronized movements.

Tom Roberts

On Sunday, July 26, 2020 at 9:53:24 PM UTC+3, Tom Roberts wrote:
> On 7/26/20 4:14 AM, margaretporat@gmail.com wrote:
> > On Saturday, July 6, 2019 at 2:22:40 AM UTC+3, Tom Roberts wrote:
> >> The "source" of curvature in GR is the full
> >> energy-momentum tensor, not just mass. So even massless phenomena such
> >> as electromagnetic fields and waves
> > ================================
> > electromagnetic field
> > has no mass """"????
>
> Yes. In classical electrodynamics it is quite clear that the EM field is
> massless. In QED, the theory assigns zero mass to photons, and the
> experimental upper bound on the photon mass is 1E-18 eV, a fantastically
> tiny upper bound.
>
> > WE CANNOT DETECT ***ANY OBJECT***
> > IF IT HAS NO MASS !!!
>
> So you claim, and keep repeating, without any justification whatsoever.
>
> I point out that we do indeed detect photons, even though they
> presumably have zero mass.
>
> I also point out that we detect sound waves, waves on the beach, and
> many other types of waves, all of which CLEARLY have no mass -- they are
> just specific kinds of synchronized movements.
>
> Tom Roberts
=========================
some news for you
the mass he **single*photon is about
exp-80 KG
see Google old thread of

'the mass of the real single ton
===
Y.P
================