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Old May 14th 08 posted to sci.physics.relativity
Eric Gisse
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Posts: 17,311
Default I have an Allien genius who wants to learn GR

On May 14, 6:10*am, Mike wrote:
On May 13, 5:46*pm, Koobee Wublee wrote:

On May 13, 12:21 am, PD wrote:


On May 13, 1:24 am, Koobee Wublee wrote:
The Schwarzschild metric only applies to the spherically symmetric
polar coordinate system and nothing else. *So, you do not understand
the Schwarzschild metric, either.


No, that's incorrect. The Schwarzchild metric is a *shape*. It is most
conveniently described in one set of coordinates, but it can certainly
be described in more than one coordinate system.


The spacetime described by the Schwarzschild metric only applied to
the spherically symmetric polar coordinate. *You are welcome to
transform to another coordinate system with a different metric. *


No, the Schwarzschild metric IS the metric. There is no such thing as
Schwarzschild metric in a coordinate system with a metric.

I think you are pounding on a non-issue. The *real issue is a more
important one: in the limit the Schwarzschild metric reduc es to
Minkowski spacetime, which is gravity free. Yet, in physical reality
there is gravity is such limit.


They reduce to the same limit, Mike. Expand the metric in a power
series expansion of GM/r for GM / r 1.


Thus, the solution is empirically falsified.

Mike

The
segment of spacetime remains the same and thus invariant while the
coordinate is your choice as well as the metric associated with this
coordinate to describe the invariant segment of spacetime.


This concept is so basic, but you have a lot of trouble understanding
that. *There is no need to go through the rest of your babbling.
shrug


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