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koobee.wublee@gmail.com science forum Guru Wannabe
Joined: 01 Feb 2006
Posts: 141

Posted: Mon Jul 10, 2006 5:31 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:ISksg.63446$fb2.25790@newssvr27.news.prodigy.net...
Quote:  Koobee Wublee wrote:
The escape velocity in General Relativity consists of more complicated
usage of the metric than your model presents.
He is discussing the Schwarzschild spacetime, which is _STATIC_. For a
static manifold, his usage of escape velocity is correct: the velocity
of an infalling test particle released from rest at infinity is equal in
magnitude to the escape velocity, at every point of its trajectory.

The Euler Lagrange equation associated with s, the spacetime itself,
yields
E^2 / (m^2 c^4) = (1  2 U) / (1  (dr/dt)^2 / (1  2 U)^2 / c^2 + ...)
Where
** U = G M / r / c^2
Thus, the escape velocity at the normalized pontential, U, is achieve
through the following.
E^2 / (m^2 c^4) <= (1  2 U) / (1  v^2 / (1  2 U)^2 / c^2)
Where
** v = escape velocity
Solving for v, we get
v >= c (1  2 U) sqrt(1  (m^2 / c^4 / E^2) (1  2 U))
In a Newtonian world, we have
** 1 >> 2 U
** E ~= m^2 c^4
Thus, we have the escape velocity identified as
v = c sqrt(2 U) = sqrt(2 G M / r)
Therefore, Mr. Zanket's escape velocity for GR is grossly simplified.
Escape velocity is the result of the metric involved; the metric is not
the result of the escape velocity.
Quote:  Additional caveats are needed for situations less symmetric
than Schw. spacetime.
That means the metric
does not have a direct impact on the escape velocity.
For this particular static situation, his construction is valid. In
general, one must integrate the metric out to infinity to determine the
escape velocity for a given path (in general the escape velocity from a
given point depends on the path taken).

To use generic terms, we have the following diagonized spacetime.
ds^2 = c^2 g_00 dt^2  g_11 dr^2 + ...
The EulerLagrange Equation associated with s yields
E^2 / (m^2 c^4) = g_00 / (1  g_11 (dr/dt)^2 / g_00 + ...)
In which, the escape velocity should then be
v = c sqrt(g_00 / g_11) sqrt(1  (m^2 / c^4 / E^2) (1  g_00))
Mr. Zanket's mistake is using the Newtonian escape velocity which is
not valid under the Schwarzschild metric. 

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koobee.wublee@gmail.com science forum Guru Wannabe
Joined: 01 Feb 2006
Posts: 141

Posted: Mon Jul 10, 2006 5:42 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:XKksg.63443$fb2.30315@newssvr27.news.prodigy.net...
Quote:  The flaw is in your assumptions, and lack of recognizing what
assumptions you are actually making, not in GR.
[...]

If I have interpreted your comments correctly, allow me to summarize
what you have said.
Mr. Zandet made one more assumption/postulate than GR where GR is piled
on several more of its own. Therefore, the validity of Mr. Zandet's
presentation of his metric is highly questionable. Since GR only makes
one fewer assumption/postulate than Mr. Zandet did, what does that
tells you with GR? 

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Zanket science forum beginner
Joined: 08 Jul 2006
Posts: 21

Posted: Mon Jul 10, 2006 6:37 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Hi Tom,
Quote:  You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0. 
No, look carefully; the analysis in section 2 is wholly above an event
horizon. The flaw can be shown between any two altitudes above an event
horizon.
Quote:  Consider this construction at
points at successively smaller values of r  in the limit as r>2M, the 
speed of the infalling object measured by these successive inertial
frames will approach c.
The speed approaches c, but does not approach a limit of c, and that's a
huge difference. Rather, the speed approaches a limit of infinity just like
escape velocity does as r tends to zero. Look at eq. 4 in fig. 2. Above an
event horizon, eq. 4 is Einstein's equation for the speed to which you
refer. What limit does it approach as r tends to zero? It approaches
infinity.
Quote:  So indeed, in the above sense the limit of the velocity of an infalling
object is indeed c. You are correct, and the speed of that infalling 
object is the escape velocity from the point it is measured. Note that
this limit of c is reached as r>2M, and there _IS_ a black hole
present. <shrug>
At and below an event horizon all objects must fall, establishing the limit
to which you refer. But that limit is a different animal than the limit the
speed approaches above an event horizon, which is infinity. Section 2 uses
the latter limit to show a flaw of GR; the former limit is immaterial to
that.
Quote:  But your section 2 is quoted in its entirety above (except some dialog),
and it does not support this claim at all. Indeed, the limit of c is 
reached at r=2M, not r=0, and that is fully consistent with the a priori
requirement that infalling velocity = escape velocity.
As noted above, you're misusing your limits. There are two limits involved.
When the applicable one is used, the claim is supported.
Quote:  Yes. But these flaws are quite different from the flaws in your
argument. Note that all other physical theories have such singularities 
and unphysical solutions, so this is not at all unique to GR. GR's
incompatibility with QM is far more serious, but your argument does not
touch upon it at all.
The comment you quoted is just saying that we already know the theory is
flawed in one way, so it should not be a surprise that it is flawed in
another way.
"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:XKksg.63443$fb2.30315@newssvr27.news.prodigy.net...
Quote:  Zanket wrote:
A Flaw of General Relativity, a New Metric and Cosmological Implications
http://zanket.home.att.net/
The flaw is in your assumptions, and lack of recognizing what
assumptions you are actually making, not in GR.
I'll discuss the exterior Schwarzschild solution in GR, using the usual
radial variable r. I'll use the usual definition and call it a black hole.
Your article says:
Section 1 shows that directly measured freefall velocity approaches a
limit of c in a uniform gravitational field. This limit applies
everywhere since a gravitational field is everywhere uniform locally.
Then the directly measured freefall velocity of an object falling
freely from rest at infinity approaches a limit of c. This was inferred
by means general relativity allows. In general relativity, above an event
horizon of a black hole, an object falling freely from
rest at infinity passes each altitude at a directly measured velocity
equal to the escape velocity there (3). If this velocity approached a
limit of c then so would escape velocity, in which case
escape velocity would always be less than c and then there would be
no black holes. But general relativity predicts black holes. Then
the theory is inconsistent.
You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0. And you assume that this coordinate
system can be used to measure meaningful velocities with a limit of c as
predicted by SR. This is a blatantly false assumption, because the
manifold is curved. It is indeed true that at each point along the
falling object's path you can find LOCAL coordinates with that property,
but there is no such SINGLE coordinate system throughout, as you
implicitly assumed. See below for how to do this.
Let me discuss this particular statement there in more detail:
If this velocity approached a limit of c then so would escape velocity,
in which case escape velocity would always be less than c and then there
would be no black holes.
Consider an object infalling from r=infinity. At every point along its
trajectory one can construct a LOCAL inertial frame by using standard
clocks and rulers, holding them at rest relative to the black hole, and
releasing them into freefall just as the infalling object arrives (one
must prearrange to set the clocks so they will be synchronized
immediately after the frame is released). Consider this construction at
points at successively smaller values of r  in the limit as r>2M, the
speed of the infalling object measured by these successive inertial
frames will approach c.
So indeed, in the above sense the limit of the velocity of an infalling
object is indeed c. You are correct, and the speed of that infalling
object is the escape velocity from the point it is measured. Note that
this limit of c is reached as r>2M, and there _IS_ a black hole
present. <shrug
In Section 3 you say:
an object falling freely from rest at infinity passes each altitude at a
directly measured velocity equal to the escape velocity there, in which
case section 2 shows that escape velocity must approach a limit of c
(unity) as r tends to zero.
But your section 2 is quoted in its entirety above (except some dialog),
and it does not support this claim at all. Indeed, the limit of c is
reached at r=2M, not r=0, and that is fully consistent with the a priori
requirement that infalling velocity = escape velocity.
You are implicitly assuming that the object can escape from any point
with r>0 (and therefore must have speed <c relative to any
locallyinertial frame). But you have no basis for this assumption, and
did not even mention it at all. In fact, in GR for the Schwarzschild
spacetime, a timelike object cannot escape from any point with r<2M 
this is not an assumption, but is a _conclusion_ based on the geometry
of the manifold.
It has long been known that general relativity predicts its own demise by
predicting central singularities where its equations fail and where it is
incompatible with quantum mechanics. Then it should not be a surprise
that the theory is flawed.
Yes. But these flaws are quite different from the flaws in your
argument. Note that all other physical theories have such singularities
and unphysical solutions, so this is not at all unique to GR. GR's
incompatibility with QM is far more serious, but your argument does not
touch upon it at all.
Your argument is based on basic misunderstandings, no more.
Tom Roberts 


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Bilge science forum Guru
Joined: 30 Apr 2005
Posts: 2816

Posted: Mon Jul 10, 2006 7:13 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Zanket:
Quote:  I assume you can't find an actual problem.

Assume whatever you want. You are arguing against your own
misrepresentation of general relativity.
Quote:  "Bilge" <dubious@radioactivex.lebesqueal.net> wrote in message
news:slrneav6d7.2tl.dubious@radioactivex.lebesqueal.net...
Zanket:
A Flaw of General Relativity, a New Metric and Cosmological Implications
http://zanket.home.att.net/
Abstract: General relativity is shown to be inconsistent.
Try again. Your argument is based on your misunderstanding
of general relativity and/or black koles. General relativity is
not invalidated by your misunderstanding of it.
[...]
For the babies: Yes, I know I'm a crackpot for challenging general
relativity, a proven fact. And yes I know that "experimental
confirmation"
in no way implies empirical evidence.
No, the reason that you are a crackpot is that you insist that general
relativity be defined by your own misunderstanding of general relativity
used as a strawman. You can find lots of articles in the physics
literature,
written by noncrackpots who question general relativity.
By the way, what is it that makes you nutcases such religious
zealots for a galilean spacetime? It's just geometry. Do you
realize your entire crusade amounts to a jihad over euclid's
fifth postulate? Sheeesh...



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Sorcerer1 science forum Guru
Joined: 09 Jun 2006
Posts: 410

Posted: Mon Jul 10, 2006 10:41 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:XKksg.63443$fb2.30315@newssvr27.news.prodigy.net...
 Zanket wrote:
 > A Flaw of General Relativity, a New Metric and Cosmological
 > Implications http://zanket.home.att.net/

 The flaw is in your assumptions, and lack of recognizing what
 assumptions you are actually making, not in GR.
This is PHYSICS, not math or logic, and "proof" is completely irrelevant. 
Humpty Roberts.
Androcles. 

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Dirk Van de moortel science forum Guru
Joined: 01 May 2005
Posts: 3019

Posted: Mon Jul 10, 2006 10:58 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



"Koobee Wublee" <koobee.wublee@gmail.com> wrote in message news:1152510153.277694.104560@s13g2000cwa.googlegroups.com...
Quote:  "Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:XKksg.63443$fb2.30315@newssvr27.news.prodigy.net...
The flaw is in your assumptions, and lack of recognizing what
assumptions you are actually making, not in GR.
[...]
If I have interpreted your comments correctly, allow me to summarize
what you have said.
Mr. Zandet made one more assumption/postulate than GR where GR is piled
on several more of its own. Therefore, the validity of Mr. Zandet's
presentation of his metric is highly questionable. Since GR only makes
one fewer assumption/postulate than Mr. Zandet did, what does that
tells you with GR?

If you can't even properly read the string "Zanket", how would
you expect to have correctly interpreted Tom's comments?
Dirk Vdm 

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Sorcerer1 science forum Guru
Joined: 09 Jun 2006
Posts: 410

Posted: Mon Jul 10, 2006 11:29 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



"Dirk Van de moortel" <dirkvandemoortel@ThankSNOSperM.hotmail.com> wrote
in message news:jpqsg.528975$bn7.12748973@phobos.telenetops.be...
[anip]
This is PHYSICS, not math or logic, and "proof" is completely irrelevant. 
Humpty Roberts,
coauthor of relativity FAQs.
Never mind the math, check the physics.  Dork Van de merde, local village
idiot.
Androcles. 

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mluttgens@wanadoo.fr science forum Guru Wannabe
Joined: 11 Sep 2005
Posts: 290

Posted: Mon Jul 10, 2006 12:43 pm Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Sue... wrote:
Quote:  Zanket wrote:
A Flaw of General Relativity, a New Metric and Cosmological Implications
http://zanket.home.att.net/
Abstract: General relativity is shown to be inconsistent. A new metric for
Schwarzschild geometry is derived and shown to be confirmed by all
experimental tests of the Schwarzschild metric. (Those tests compose the
vast majority of experimental tests of general relativity.) The predictions
of the new metric and the Schwarzschild metric diverge as gravity
strengthens. Black holes are not predicted by the new metric. The
cosmological implications show that gravity alone can explain away the
flatness and horizon problems and cause the universe to seemingly accelerate
in its expansion.
Serious discussion appreciated, especially from those who attack the paper
directly.
For the babies: Yes, I know I'm a crackpot for challenging general
relativity, a proven fact. And yes I know that "experimental confirmation"
in no way implies empirical evidence.
Most real world clocks (Mossbauer, Cesium ) respond gravitationally
as we would predict for any oscillating mass. The elements loose
energy to a planet by following curved rather than straight paths.
The Schwarzschild solution, somewhat carelessly treats this
effect as a change in time rather than energy. The error is
demonstrated in the difference in the interpretations of the
PoundRebka and later PoundSnider experiments.
http://www.citebase.org/cgibin/citations?id=oai:arXiv.org:physics/9907017 
Sue, your often referenced paper is a masterpiece of sophistry:
arXiv: physics/ 9907017 v2 27 Jul 1999
ON THE INTERPRETATION OF THE REDSHIFT IN A STATIC GRAVITATIONAL FIELD
L.B. OKUN and K.G. SELIVANOV
ITEP, Moscow, 117218, Russia
email: okun@heron.itep.ru, selivano@heron.itep.ru
and
V.L. TELEGDI
EP Division, CERN, CH  1211 Geneva 23
email: valentine.telegdi@cern.ch
For instance,
Excerpt:
"Alongside the experiments [3][7] special measurements of the
dependence of the atomic clock rate on the altitude were done directly
by using airplanes [8], [9] (see also reviews [10]).
In these experiments a clock which had spent many hours at high
altitude was brought back to the laboratory and compared with its
"earthly twin". The latter, once corrected for various
background effects, lagged behind by Delta T = (gh/c^2)T,
where T is the duration of the flight at height h , g the gravitational
acceleration,
and c the speed of light.
[8] J. Haefele and R. Keating, "Around the world atomic clocks:
predicted relativistic gains,"
Science 177, 166167 (1972); "Around the world relativistic clocks:
observed relativistic time gains," ibid., 168170."
My comment:
Only experiments where clocks are brought back to Earth can support
the view that the flying clocks ticked faster than the ground clocks.
Till now, this has been done only once, it was the H&K experiment,
but "An analysis of the real data shows that no credence can be
given to the conclusions of Hafele and Keating.", see
http://www.cartesioepisteme.net/H&KPaper.htm .
Excerpt:
"Consider from such an elevator falling with the acceleration g
a photon of frequency Omega which is emitted upwards by an atom at
rest on the surface of the earth and which is expected to be
absorbed by an identical atom fixed at height h . The frequency of
light is not affected by any gravitational field in a freely falling
elevator: it keeps the frequency with which it was emitted.
Assume that at the moment of emission (t = 0) the elevator had zero
velocity. At the time t = h/c , when the photon reaches the absorbing
atom, the latter will have velocity v = gh/c directed upwards in
the elevator frame. As a result the frequency of the photon, as seen
by the absorbing atom, will be shifted by the linear Doppler effect
by v/c = gh/c^2 towards the red, that is
delta Omega / Omega = gh/c^2.
<...>
Obviously, in the elevator frame there is no room for the
interpretation
of the redshift in terms of a photon losing its energy as it climbs
out of the gravitational well."
And elsewhere in the paper:
"Near the earth's surface (at h = r R « R ) it is legitimate
to approximate phi linearly. <...>
(The linear approximation Eq. (2) is valid for the description of
experiments [8, 9]. It is obvious, however, that for the high flying
rockets [7] (h ~ 10^4 km), it is not adequate and the newtonian
potential should be used, but this is not essential for the dilemma
"clocks versus photons" which is the subject of this paper.)".
My comment:
The authors used v = gt and t = h/c to get v = gh/c and eventually
a shift gh/c^2 from the linear Doppler effect, the same shift as the
one obtained with "a photon losing its energy as it climbs out of
the gravitational well".
Notice that the "Doppler shift" is observed in the elevator frame,
and the "potential energy" shift is observed in the Earth frame.
But one should notice that the authors used what they called the
"linear approximation", claiming that using the Newtonian potential
is not essential for the "dilemma clocks vs photons".
This is wrong. If they had used g = GM/(R*(R+h)) instead of linearly
g = GM/R^2, their demonstration "in favor of clocks", using v = gt and
the Doppler effect, would have been a failure.
Conclusively, the authors' claim (see abstract) that the approach
in terms of an energy loss of a photon as it overcomes the
gravitational attraction of the massive body is misleading is not
justified, on the contrary.
Marcel Luttgens
Quote: 
The Kankek paper is too extensive for a hobbyist as myself to
attack or support but the cause of the interpretive errors
certainly warrants further illumination. I reserve my toughest
skepticism for any cosmlogical extrapolatons which can't rigoursly
show they are not founded on the misinterpretation of PoundRebka.
The Kankek paper might be a little more concise
and less theoretical by focusing on the errors that can result
when time is interchanged for energy.
Sue... 


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mluttgens@wanadoo.fr science forum Guru Wannabe
Joined: 11 Sep 2005
Posts: 290

Posted: Mon Jul 10, 2006 2:16 pm Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



mluttgens@wanadoo.fr wrote:
Quote:  Sue... wrote:
Zanket wrote:
A Flaw of General Relativity, a New Metric and Cosmological Implications
http://zanket.home.att.net/
Abstract: General relativity is shown to be inconsistent. A new metric for
Schwarzschild geometry is derived and shown to be confirmed by all
experimental tests of the Schwarzschild metric. (Those tests compose the
vast majority of experimental tests of general relativity.) The predictions
of the new metric and the Schwarzschild metric diverge as gravity
strengthens. Black holes are not predicted by the new metric. The
cosmological implications show that gravity alone can explain away the
flatness and horizon problems and cause the universe to seemingly accelerate
in its expansion.
Serious discussion appreciated, especially from those who attack the paper
directly.
For the babies: Yes, I know I'm a crackpot for challenging general
relativity, a proven fact. And yes I know that "experimental confirmation"
in no way implies empirical evidence.
Most real world clocks (Mossbauer, Cesium ) respond gravitationally
as we would predict for any oscillating mass. The elements loose
energy to a planet by following curved rather than straight paths.
The Schwarzschild solution, somewhat carelessly treats this
effect as a change in time rather than energy. The error is
demonstrated in the difference in the interpretations of the
PoundRebka and later PoundSnider experiments.
http://www.citebase.org/cgibin/citations?id=oai:arXiv.org:physics/9907017
Sue, your often referenced paper is a masterpiece of sophistry:
arXiv: physics/ 9907017 v2 27 Jul 1999
ON THE INTERPRETATION OF THE REDSHIFT IN A STATIC GRAVITATIONAL FIELD
L.B. OKUN and K.G. SELIVANOV
ITEP, Moscow, 117218, Russia
email: okun@heron.itep.ru, selivano@heron.itep.ru
and
V.L. TELEGDI
EP Division, CERN, CH  1211 Geneva 23
email: valentine.telegdi@cern.ch
For instance,
Excerpt:
"Alongside the experiments [3][7] special measurements of the
dependence of the atomic clock rate on the altitude were done directly
by using airplanes [8], [9] (see also reviews [10]).
In these experiments a clock which had spent many hours at high
altitude was brought back to the laboratory and compared with its
"earthly twin". The latter, once corrected for various
background effects, lagged behind by Delta T = (gh/c^2)T,
where T is the duration of the flight at height h , g the gravitational
acceleration,
and c the speed of light.
[8] J. Haefele and R. Keating, "Around the world atomic clocks:
predicted relativistic gains,"
Science 177, 166167 (1972); "Around the world relativistic clocks:
observed relativistic time gains," ibid., 168170."
My comment:
Only experiments where clocks are brought back to Earth can support
the view that the flying clocks ticked faster than the ground clocks.
Till now, this has been done only once, it was the H&K experiment,
but "An analysis of the real data shows that no credence can be
given to the conclusions of Hafele and Keating.", see
http://www.cartesioepisteme.net/H&KPaper.htm .
Excerpt:
"Consider from such an elevator falling with the acceleration g
a photon of frequency Omega which is emitted upwards by an atom at
rest on the surface of the earth and which is expected to be
absorbed by an identical atom fixed at height h . The frequency of
light is not affected by any gravitational field in a freely falling
elevator: it keeps the frequency with which it was emitted.
Assume that at the moment of emission (t = 0) the elevator had zero
velocity. At the time t = h/c , when the photon reaches the absorbing
atom, the latter will have velocity v = gh/c directed upwards in
the elevator frame. As a result the frequency of the photon, as seen
by the absorbing atom, will be shifted by the linear Doppler effect
by v/c = gh/c^2 towards the red, that is
delta Omega / Omega = gh/c^2.
...
Obviously, in the elevator frame there is no room for the
interpretation
of the redshift in terms of a photon losing its energy as it climbs
out of the gravitational well."
And elsewhere in the paper:
"Near the earth's surface (at h = r R « R ) it is legitimate
to approximate phi linearly. <...
(The linear approximation Eq. (2) is valid for the description of
experiments [8, 9]. It is obvious, however, that for the high flying
rockets [7] (h ~ 10^4 km), it is not adequate and the newtonian
potential should be used, but this is not essential for the dilemma
"clocks versus photons" which is the subject of this paper.)".
My comment:
The authors used v = gt and t = h/c to get v = gh/c and eventually
a shift gh/c^2 from the linear Doppler effect, the same shift as the
one obtained with "a photon losing its energy as it climbs out of
the gravitational well".
Notice that the "Doppler shift" is observed in the elevator frame,
and the "potential energy" shift is observed in the Earth frame.
But one should notice that the authors used what they called the
"linear approximation", claiming that using the Newtonian potential
is not essential for the "dilemma clocks vs photons".
This is wrong. If they had used g = GM/(R*(R+h)) instead of linearly
g = GM/R^2, their demonstration "in favor of clocks", using v = gt and
the Doppler effect, would have been a failure.
Conclusively, the authors' claim (see abstract) that the approach
in terms of an energy loss of a photon as it overcomes the
gravitational attraction of the massive body is misleading is not
justified, on the contrary.
Marcel Luttgens

I claimed:
"This is wrong. If they had used g = GM/(R*(R+h)) instead of linearly
g = GM/R^2, their demonstration "in favor of clocks", using v = gt and
the Doppler effect, would have been a failure."
Sorry, the authors would have obtained in the elevator frame a shift of
(GM/c^2) * (h/R*(R+h)), which is right.
Anyhow, in the Earth frame, the same shift is obtained, but which
is explained by the relativistic mass and the loss of potential
energy of the photon.
Marcel Luttgens
Quote: 
The Kankek paper is too extensive for a hobbyist as myself to
attack or support but the cause of the interpretive errors
certainly warrants further illumination. I reserve my toughest
skepticism for any cosmlogical extrapolatons which can't rigoursly
show they are not founded on the misinterpretation of PoundRebka.
The Kankek paper might be a little more concise
and less theoretical by focusing on the errors that can result
when time is interchanged for energy.
Sue... 


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Zanket science forum beginner
Joined: 08 Jul 2006
Posts: 21

Posted: Mon Jul 10, 2006 5:53 pm Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Yes master.
"Bilge" <dubious@radioactivex.lebesqueal.net> wrote in message
news:slrneb43i5.5g8.dubious@radioactivex.lebesqueal.net...
Quote:  Zanket:
I assume you can't find an actual problem.
Assume whatever you want. You are arguing against your own
misrepresentation of general relativity.
"Bilge" <dubious@radioactivex.lebesqueal.net> wrote in message
news:slrneav6d7.2tl.dubious@radioactivex.lebesqueal.net...
Zanket:
A Flaw of General Relativity, a New Metric and Cosmological
Implications
http://zanket.home.att.net/
Abstract: General relativity is shown to be inconsistent.
Try again. Your argument is based on your misunderstanding
of general relativity and/or black koles. General relativity is
not invalidated by your misunderstanding of it.
[...]
For the babies: Yes, I know I'm a crackpot for challenging general
relativity, a proven fact. And yes I know that "experimental
confirmation"
in no way implies empirical evidence.
No, the reason that you are a crackpot is that you insist that general
relativity be defined by your own misunderstanding of general
relativity
used as a strawman. You can find lots of articles in the physics
literature,
written by noncrackpots who question general relativity.
By the way, what is it that makes you nutcases such religious
zealots for a galilean spacetime? It's just geometry. Do you
realize your entire crusade amounts to a jihad over euclid's
fifth postulate? Sheeesh...



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Zanket science forum beginner
Joined: 08 Jul 2006
Posts: 21

Posted: Tue Jul 11, 2006 12:25 pm Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Tom,
To the paper I added a reader comment about your main points:
Reader: At and below an event horizon, the directly measured velocity of an
object is always less than c. So directly measured freefall velocity *does*
approach a limit of c.
Author: That puts the cart before the horse. If the velocity approached a
limit of c then so would escape velocity, and then there would be no event
horizons.
Quote:  You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0. And you assume that this coordinate
system can be used to measure meaningful velocities with a limit of c as
predicted by SR. This is a blatantly false assumption, because the
manifold is curved. It is indeed true that at each point along the
falling object's path you can find LOCAL coordinates with that property,
but there is no such SINGLE coordinate system throughout, as you
implicitly assumed. See below for how to do this.

The paper already had a reader comment to address this:
Reader: Special relativity does not apply to curved spacetime.
Author: It is used only in flat spacetime.
"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:XKksg.63443$fb2.30315@newssvr27.news.prodigy.net...
Quote:  Zanket wrote:
A Flaw of General Relativity, a New Metric and Cosmological Implications
http://zanket.home.att.net/
The flaw is in your assumptions, and lack of recognizing what
assumptions you are actually making, not in GR.
I'll discuss the exterior Schwarzschild solution in GR, using the usual
radial variable r. I'll use the usual definition and call it a black hole.
Your article says:
Section 1 shows that directly measured freefall velocity approaches a
limit of c in a uniform gravitational field. This limit applies
everywhere since a gravitational field is everywhere uniform locally.
Then the directly measured freefall velocity of an object falling
freely from rest at infinity approaches a limit of c. This was inferred
by means general relativity allows. In general relativity, above an event
horizon of a black hole, an object falling freely from
rest at infinity passes each altitude at a directly measured velocity
equal to the escape velocity there (3). If this velocity approached a
limit of c then so would escape velocity, in which case
escape velocity would always be less than c and then there would be
no black holes. But general relativity predicts black holes. Then
the theory is inconsistent.
You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0. And you assume that this coordinate
system can be used to measure meaningful velocities with a limit of c as
predicted by SR. This is a blatantly false assumption, because the
manifold is curved. It is indeed true that at each point along the
falling object's path you can find LOCAL coordinates with that property,
but there is no such SINGLE coordinate system throughout, as you
implicitly assumed. See below for how to do this.
Let me discuss this particular statement there in more detail:
If this velocity approached a limit of c then so would escape velocity,
in which case escape velocity would always be less than c and then there
would be no black holes.
Consider an object infalling from r=infinity. At every point along its
trajectory one can construct a LOCAL inertial frame by using standard
clocks and rulers, holding them at rest relative to the black hole, and
releasing them into freefall just as the infalling object arrives (one
must prearrange to set the clocks so they will be synchronized
immediately after the frame is released). Consider this construction at
points at successively smaller values of r  in the limit as r>2M, the
speed of the infalling object measured by these successive inertial
frames will approach c.
So indeed, in the above sense the limit of the velocity of an infalling
object is indeed c. You are correct, and the speed of that infalling
object is the escape velocity from the point it is measured. Note that
this limit of c is reached as r>2M, and there _IS_ a black hole
present. <shrug
In Section 3 you say:
an object falling freely from rest at infinity passes each altitude at a
directly measured velocity equal to the escape velocity there, in which
case section 2 shows that escape velocity must approach a limit of c
(unity) as r tends to zero.
But your section 2 is quoted in its entirety above (except some dialog),
and it does not support this claim at all. Indeed, the limit of c is
reached at r=2M, not r=0, and that is fully consistent with the a priori
requirement that infalling velocity = escape velocity.
You are implicitly assuming that the object can escape from any point
with r>0 (and therefore must have speed <c relative to any
locallyinertial frame). But you have no basis for this assumption, and
did not even mention it at all. In fact, in GR for the Schwarzschild
spacetime, a timelike object cannot escape from any point with r<2M 
this is not an assumption, but is a _conclusion_ based on the geometry
of the manifold.
It has long been known that general relativity predicts its own demise by
predicting central singularities where its equations fail and where it is
incompatible with quantum mechanics. Then it should not be a surprise
that the theory is flawed.
Yes. But these flaws are quite different from the flaws in your
argument. Note that all other physical theories have such singularities
and unphysical solutions, so this is not at all unique to GR. GR's
incompatibility with QM is far more serious, but your argument does not
touch upon it at all.
Your argument is based on basic misunderstandings, no more.
Tom Roberts 


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Zanket science forum beginner
Joined: 08 Jul 2006
Posts: 21

Posted: Tue Jul 11, 2006 12:37 pm Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Quote:  Mr. Zanket's mistake is using the Newtonian escape velocity which is
not valid under the Schwarzschild metric.

For Schwarzschild geometry Einstein shares Newton's escape velocity
equation, eq. 4. Only their interpretations of it differ.
"Koobee Wublee" <koobee.wublee@gmail.com> wrote in message
news:1152509505.445303.295070@m79g2000cwm.googlegroups.com...
Quote:  "Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:ISksg.63446$fb2.25790@newssvr27.news.prodigy.net...
Koobee Wublee wrote:
The escape velocity in General Relativity consists of more complicated
usage of the metric than your model presents.
He is discussing the Schwarzschild spacetime, which is _STATIC_. For a
static manifold, his usage of escape velocity is correct: the velocity
of an infalling test particle released from rest at infinity is equal in
magnitude to the escape velocity, at every point of its trajectory.
The Euler Lagrange equation associated with s, the spacetime itself,
yields
E^2 / (m^2 c^4) = (1  2 U) / (1  (dr/dt)^2 / (1  2 U)^2 / c^2 + ...)
Where
** U = G M / r / c^2
Thus, the escape velocity at the normalized pontential, U, is achieve
through the following.
E^2 / (m^2 c^4) <= (1  2 U) / (1  v^2 / (1  2 U)^2 / c^2)
Where
** v = escape velocity
Solving for v, we get
v >= c (1  2 U) sqrt(1  (m^2 / c^4 / E^2) (1  2 U))
In a Newtonian world, we have
** 1 >> 2 U
** E ~= m^2 c^4
Thus, we have the escape velocity identified as
v = c sqrt(2 U) = sqrt(2 G M / r)
Therefore, Mr. Zanket's escape velocity for GR is grossly simplified.
Escape velocity is the result of the metric involved; the metric is not
the result of the escape velocity.
Additional caveats are needed for situations less symmetric
than Schw. spacetime.
That means the metric
does not have a direct impact on the escape velocity.
For this particular static situation, his construction is valid. In
general, one must integrate the metric out to infinity to determine the
escape velocity for a given path (in general the escape velocity from a
given point depends on the path taken).
To use generic terms, we have the following diagonized spacetime.
ds^2 = c^2 g_00 dt^2  g_11 dr^2 + ...
The EulerLagrange Equation associated with s yields
E^2 / (m^2 c^4) = g_00 / (1  g_11 (dr/dt)^2 / g_00 + ...)
In which, the escape velocity should then be
v = c sqrt(g_00 / g_11) sqrt(1  (m^2 / c^4 / E^2) (1  g_00))
Mr. Zanket's mistake is using the Newtonian escape velocity which is
not valid under the Schwarzschild metric.



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Tom Roberts science forum Guru
Joined: 24 Mar 2005
Posts: 1399

Posted: Wed Jul 12, 2006 12:53 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Zanket wrote:
Quote:  Tom Roberts said:
You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0.
No, look carefully; the analysis in section 2 is wholly above an event
horizon. The flaw can be shown between any two altitudes above an event
horizon.

No, your whole point is as r>0.
Quote:  Consider this construction at
points at successively smaller values of r  in the limit as r>2M, the
speed of the infalling object measured by these successive inertial
frames will approach c.
The speed approaches c, but does not approach a limit of c, and that's a
huge difference.

Sure that is a limit  you cannot actually evaluate anything in these
coordinate _at_ r=2M, you can only approach r=2M from above. That's what
a limit is. <shrug>
Quote:  Rather, the speed approaches a limit of infinity just like
escape velocity does as r tends to zero.

Nonsense. The limit r>0 DOES NOT EXIST because these coordinates are
invalid for r<=2M. <shrug>
Quote:  At and below an event horizon all objects must fall, establishing the limit
to which you refer. But that limit is a different animal than the limit the
speed approaches above an event horizon, which is infinity. Section 2 uses
the latter limit to show a flaw of GR; the former limit is immaterial to
that.

Your section 2 does no such thing. It _assumes_ that r=0 can be
approached, when in fact it cannot.
Tom Roberts 

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Tom Roberts science forum Guru
Joined: 24 Mar 2005
Posts: 1399

Posted: Wed Jul 12, 2006 12:58 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



Zanket wrote:
Quote:  Reader: At and below an event horizon, the directly measured velocity of an
object is always less than c. So directly measured freefall velocity *does*
approach a limit of c.
Author: That puts the cart before the horse. If the velocity approached a
limit of c then so would escape velocity, and then there would be no event
horizons.

You are quite confused, and have completely hidden the frames relative
to which your velocities are measured. Outside the horizon my earlier
construction can be used to measure the infalling object's speed
relative to a local inertial frame at rest relative to the black hole.
As I said before, such measurements _DO_ approach a limit of c as r>2M
(for an object released from rest at r=infinity).
For r<=2M that construction simply cannot be done because there are no
such frames.
Because your statements here have hidden important details they are just
plain wrong. As is your conclusion  there _IS_ an event horizon. <shrug>
Tom Roberts 

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Zanket science forum beginner
Joined: 08 Jul 2006
Posts: 21

Posted: Wed Jul 12, 2006 11:26 am Post subject:
Re: A Flaw of General Relativity, a New Metric and Cosmological Implications



You are putting the cart before the horse below. I'll address that in your
other post to avoid duplication.
"Tom Roberts" <tjroberts137@sbcglobal.net> wrote in message
news:MJXsg.63698$Lm5.22007@newssvr12.news.prodigy.com...
Quote:  Zanket wrote:
Tom Roberts said:
You are implicitly assuming a single coordinate system can be used from
infinity all the way in to r=0.
No, look carefully; the analysis in section 2 is wholly above an event
horizon. The flaw can be shown between any two altitudes above an event
horizon.
No, your whole point is as r>0.
Consider this construction at
points at successively smaller values of r  in the limit as r>2M, the
speed of the infalling object measured by these successive inertial
frames will approach c.
The speed approaches c, but does not approach a limit of c, and that's a
huge difference.
Sure that is a limit  you cannot actually evaluate anything in these
coordinate _at_ r=2M, you can only approach r=2M from above. That's what a
limit is. <shrug
Rather, the speed approaches a limit of infinity just like escape
velocity does as r tends to zero.
Nonsense. The limit r>0 DOES NOT EXIST because these coordinates are
invalid for r<=2M. <shrug
At and below an event horizon all objects must fall, establishing the
limit to which you refer. But that limit is a different animal than the
limit the speed approaches above an event horizon, which is infinity.
Section 2 uses the latter limit to show a flaw of GR; the former limit is
immaterial to that.
Your section 2 does no such thing. It _assumes_ that r=0 can be
approached, when in fact it cannot.
Tom Roberts 


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