Is Spacetime Flat or Curved ?

[4***@gmail.com]

Many cosmologists believe that '' spacetime is curved ''
====
The spacetime (as whole ) is cold continuum.
The light travels in this continuum in a straight line.
But near the hot masses of stars light can be curved.
Not spacetime curves but the movement of light is curved by hot masses.
#
Sun changes the road of light like a car changes its movement by road
but Euclidian geometry of Earth remains unchanged.
#
Sun (and its surrounded space) curves the straight movement of light quanta,
but the geometry of Pseudo Euclidian (Minkovski ) spacetime remains unchanged.

=====================
Israel Sadovnik Socratus

[4***@gmail.com]

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.
So, locally, spacetime is curved around every object with mass.

http://www.skyandtelescope.com/astronomy-resources/curvature-of-spacece/

Only '' around every (local - hot) object with mass.'' light is curved.
The mass-objects in the universe (as whole) is very few.
Therefore the universe (as whole) is a flat spacetime (vacuum) continuum.
#
Different objects and all different waves act in vacuum.
(one of vacuum's name is spacetime because in vacuum space and time are united)
===================================
Israel Sadovnik Socratus

[p***@gmail.com]

Post by 4***@gmail.com
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!!
2
see the y circlon mechanism
http://sites.google.com/site/theyporatmodel/an-abstract
at its appendix !!

TIA
Y.P
====================

Post by 4***@gmail.com
So, locally, spacetime is curved around every object with mass.
http://www.skyandtelescope.com/astronomy-resources/curvature-of-spacece/
Only '' around every (local - hot) object with mass.'' light is curved.
The mass-objects in the universe (as whole) is very few.
Therefore the universe (as whole) is a flat spacetime (vacuum) continuum.
#
Different objects and all different waves act in vacuum.
(one of vacuum's name is spacetime because in vacuum space and time are united)
===================================
Israel Sadovnik Socratus

[Tom Roberts]

Post by 4***@gmail.com

Post by 4***@gmail.com
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 can generate spacetime curvature,
and thus gravity.

Tom Roberts

[p***@gmail.com]

Post by Tom Roberts

Post by 4***@gmail.com

Post by 4***@gmail.com
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 '' )

======================

Mr professional parrot

Post by Tom Roberts

Post by 4***@gmail.com
it means that the active entity
is ....... mass!!!

see for instance the
Faraday experiment with the permanent magnet
and you will get wiser unless you are a born parrot
or may be
you are making your life income as a teacher
from f en ''curved space time ''''

TIA
Y.Porat
===============

Post by Tom Roberts

Post by 4***@gmail.com
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 can generate spacetime curvature,
and thus gravity.
Tom Roberts

[p***@gmail.com]

Post by 4***@gmail.com

Post by Tom Roberts

Post by 4***@gmail.com

Post by 4***@gmail.com
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 '' )

======================
Mr professional parrot

Post by Tom Roberts

Post by 4***@gmail.com
it means that the active entity
is ....... mass!!!

see for instance the
Faraday experiment with the permanent magnet
and you will get wiser unless you are a born parrot
or may be
you are making your life income as a teacher
from f en ''curved space time ''''
TIA
Y.Porat
===============

Post by Tom Roberts

Post by 4***@gmail.com
and that s it!!! full stop!!

No, that is NOT it. The "source" of curvature in GR is the full
energy-momentum tensor,

================================
physics is not mathematics !!just impressive vooddo magic
mumbling

if you yourself dont understand what you are mumbling
how do you expect that others will swallow it ??
do you consider all others as idiots ??

how do you expect that others will be impressed
not just mass. So even massless phenomena such

Post by 4***@gmail.com

Post by Tom Roberts
as electromagnetic fields

Mr cureless parrot
some news for you

even em waves HAS MASS
THE MASS THE REAL SINGLE PHOTON
ia BOUT (sit still on your chair)
is about
exp -90 kilogram !!!
i proved i many times in past
in this very ng !!


and waves can generate spacetime curvature,
??
and can lie eggs of birds as well

Post by 4***@gmail.com

Post by Tom Roberts
and thus gravity.

==
bravo!!
you are a NOBEL PRIZE
========================
ATB
Y.P
=====================

[m***@gmail.com]

Post by Tom Roberts

Post by 4***@gmail.com

Post by 4***@gmail.com
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,

Post by Tom Roberts
and thus gravity.
Tom Roberts

[Tom Roberts]

Post by 4***@gmail.com

Post by Tom Roberts
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.

Post by 4***@gmail.com
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

[m***@gmail.com]

Post by Tom Roberts

Post by 4***@gmail.com

Post by Tom Roberts
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.

Post by 4***@gmail.com
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
================

[4***@gmail.com]

a)
The fourth dimension (an absolute spacetime) is the
negative two (-2) dimensions flat negative Pseudo Euclidian spacetime.
( + 4-D = -2D )
b)
We know only one system where apace and time are united and this
is Vacuum. Spacetime = Vacuum.
c)
From this absolute spacetime (vacuum) our three dimensions + time
Earth - gravity existence were created.
d)
We don't need 5-D, 11-D, 27-D . . . etc. to explain the Existence.

==================

[Thomas 'PointedEars' Lahn]

Post by 4***@gmail.com
a)
The fourth dimension (an absolute spacetime) is the
negative two (-2) dimensions flat negative Pseudo Euclidian spacetime.
( + 4-D = -2D )

Not even wrong. Please educate yourself.

[Thomas 'PointedEars' Lahn]

Post by 4***@gmail.com
Many cosmologists believe that '' spacetime is curved ''

You are off-topic. This belongs in .relativity instead.

Post by 4***@gmail.com
====
The spacetime (as whole ) is cold continuum.

No. Spacetime is a mathematical model of the geometry of the universe.
Temperature does not feature in it directly.

Post by 4***@gmail.com
The light travels in this continuum in a straight line.

If, and only if, the spacetime through which it travels is flat (pseudo-
Euclidean).

Post by 4***@gmail.com
But near the hot masses of stars light can be curved.

It does not matter that the stars are hot. All that matters is the density
of stress, energy and momentum. Mostly energy density, and as rest energy
is equivalent to mass, mass density matters most.

IOW, a brown dwarf or a Sun-like dwarf of the same mass as a red giant will
“curve light” in the same way, even though its average temperature is much
lower.

Post by 4***@gmail.com
Not spacetime curves but the movement of light is curved by hot masses.

Black holes (without jets) are among the coldest things there are as they
emit only Hawking radiation, if any; yet they “curve light” that much that
they can act as gravitational lenses, magnifying objects far behind them for
us to observe.

This refutes your argument.

Post by 4***@gmail.com
[Further misconceptions and fallacies]

Pass “Physics 101” first.

[m***@gmail.com]

Post by 4***@gmail.com
Many cosmologists believe that '' spacetime is curved ''
====
The spacetime (as whole ) is cold continuum.
The light travels in this continuum in a straight line.
But near the hot masses of stars light can be curved.
Not spacetime curves but the movement of light is curved by hot masses.
#
Sun changes the road of light like a car changes its movement by road
but Euclidian geometry of Earth remains unchanged.
#
Sun (and its surrounded space) curves the straight movement of light quanta,
but the geometry of Pseudo Euclidian (Minkovski ) spacetime remains unchanged.
=====================
Israel Sadovnik Socratus

========================
space is nothing
and if so
it is not curved and not scmerved


IT (all forces IS ALL DONE BY MASS!!

ATB
Y.Porat
==============

[p***@gmail.com]

Post by 4***@gmail.com
Many cosmologists believe that '' spacetime is curved ''
====
The spacetime (as whole ) is cold continuum.
The light travels in this continuum in a straight line.
But near the hot masses of stars light can be curved.
Not spacetime curves but the movement of light is curved by hot masses.
#
Sun changes the road of light like a car changes its movement by road
but Euclidian geometry of Earth remains unchanged.
#
Sun (and its surrounded space) curves the straight movement of light quanta,
but the geometry of Pseudo Euclidian (Minkovski ) spacetime remains unchanged.
=====================
Israel Sadovnik Socratus

==================
space is nothing
not curved
bot flat
it is nothing
==
Y>P
=======

[p***@gmail.com]

Post by 4***@gmail.com

Post by 4***@gmail.com
Many cosmologists believe that '' spacetime is curved ''
====
The spacetime (as whole ) is cold continuum.
The light travels in this continuum in a straight line.
But near the hot masses of stars light can be curved.
Not spacetime curves but the movement of light is curved by hot masses.
#
Sun changes the road of light like a car changes its movement by road
but Euclidian geometry of Earth remains unchanged.
#
Sun (and its surrounded space) curves the straight movement of light quanta,
but the geometry of Pseudo Euclidian (Minkovski ) spacetime remains unchanged.
=====================
Israel Sadovnik Socratus

==================
space is nothing
not curved
bot flat
it is nothing
==
Y>P
=======

mass is the creator of all forces !!
nothing to do with curved or 'chmerved space
space is nothing
it is all done by mass
====
copy right
Y.Porat
========================