Re: SR false?

Rudolf Drabek wrote:
What I can say as a "retired el. engineer" is, that SR is very limited.

Hmmm. I guess I now qualify as a "retired engineer" too. But then, I retired from telecom engineering to take a job in physics....

Yes, SR is limited in its applicability to local measurements. Still, the majority of measurements we make are local, and on earth the approximation involved in using SR is generally negligible for all lab experiments not involving gravitation.


It is based on c=const and inertial movement and that's all.

There's a lot more to SR than that. The essence is that the underlying manifold must be flat. That is a HUGE requirement, and is one not realized in the real world (except approximately).


E.g. I start from here to Sirius with v=0.866c, gamma = 2
Why does the universe in direction to Sirius know, that it has to
shrink acc. to Gamma?

That's a very basic misconception. The "universe" isn't "shrinking" at all, it is your MEASUREMENTS that are affected RELATIVE to the measurements of an earthbound (or Sirius-bound) observer.


I have not studied to date if some of the GR effects can be expained
with Newton, e.g. GPS clocks correction.

They cannot.


Tom Roberts
.

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