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GR: Fachverband Gravitation und Relativitätstheorie

GR 18: Grundlegende Probleme

GR 18.3: Vortrag

Freitag, 19. März 2010, 14:40–15:00, JUR K

General Relativity Based on Physical Phenomena — •Albrecht Giese — Taxusweg 15, 22605 Hamburg

Whereas Newton's gravity only covers the static cases, it is the merit of Einstein that he extended gravity to the phenomena occurring at (fast) motion. But Einstein paid an enormous price for his result by changing our understanding of space and time. The resulting theory (GR) is so complex that in the opinion of Steven Weinberg not even 10 physicists may have understood it.

Historically Einstein fell into a trap when he assumed that the speed of light is always constant, even as a 1-way-speed in a moving system. The philosopher Hans Reichenbach, who otherwise supported Einstein, pointed out that this assumption is not compelling, and that Einstein's theory is not the only possible way.

We can, on the other hand, stay with the classical understanding of space, time, and speed addition. We can explain relativity by the behaviour of fields (Heaviside / Lorentz) and of particles (de Broglie / Dirac) and we should accept a variable speed of light in a gravitational field. We then achieve the same results of GR as with Einstein at least up to the Schwarzschild solution. And this way is so easy to follow that it can be taught at school.

In contrast to this, Einstein has with his complex way to relativity impeded the further development of physics for almost a century.

Further info at: www.ag-physics.org/gravity