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Old 1 Week Ago posted to sci.physics.relativity
Eric Gisse
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Posts: 15,283
Default I have an Allien genius who wants to learn GR

On May 6, 5:25*am, Mike wrote:
On May 6, 4:52*am, Eric Gisse wrote:



On May 6, 12:33*am, Mike wrote:


On May 6, 3:49*am, Eric Gisse wrote:


On May 5, 10:23*pm, Koobee Wublee wrote:


On May 5, JanPB wrote:


Mike wrote:
Suppose this allien mathematical genius arrives to earth and he is
presented with the GR equations. He knows nothing about Newtonian
physics, he oes not know what force means for earthlinks, he has never
seen F = dp/dt, or F =ma or, F = GMm/r^2


He is asked to find out what are the equations of motion in the weak
field limit.


Will he be able to derive Newton's laws of motion and universal law of
graviation in the weak field limit from the GR equations?


Yes. There is no wiggle room there.


Ask him/her/it to write down for you where the wiggle room is. Then
post it here.


There are an infinite number of solutions to the field equations. *In
vacuum, one such solution can be the following.


ds^2 = G c^2 dt^2 / (1 + r / K) – K^4 (1 + r / K) dr^2 / r^4
* * * – K^2 (1 + K / r)^2 dO^2


Where


** *G = Dimensionless constant
** *K = Constant of length
** *dO^2 = r^2 cos^2(Latitude) dLongitude^2 + r^2 dLatitude^2


It is static and spherically symmetric. *However, it is not
asymptotically flat. *Nevertheless, it is still a valid solution..


Does it degenerate into Newtonian law of gravity? *No.


Therefore, Mike is correct on this one. *Both Professor Draper and Mr.
Bielawski are very wrong. *It is time for both gentlemen to propose a
graceful retreat.


Yes, gracefully retreat from the cranks who confuse persistence of
lies with facts.- Hide quoted text -


To me and to many people I know, a crank and an imbecile, is a person
who while it insists GR is a correct theory of gravitation, he thinks
that a = GM/r^2 is and ordinary differential equation. Such a crank
exists and is called Eric Gisse as these posts proves beyond any
doubt:


http://groups.google.gr/group/sci.ph...g/01b8793b2b1f....


Eric Gisse's excuse for not being able to sove a simple mechanics
problem: "One of these days I'll stop posting on groups when I'm sleep
deprived."


http://groups.google.gr/group/sci.ph...g/cc76e4770a62....


Now, who is the crank here?


The one who can't admit he made a mistake.


Do you know if radiation pressure exists yet?


Dig hard...

you are a troll. You are supposed to be in school, yet you instantly
reply to 99% of the posts in these groups.


Does radiation pressure exist or not, Mike?


Mike



Mike


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