Tuesday, February 21, 2006

The Speed of Gravity

Here's an interesting read for budding theoretical physicists and others who don't get a headache when they find the words, relativity, causality, and gravitation, in long run-on sentences. Einstein's theory of general relativity doesn't support faster than light travel, but accounts for gravitational effects happening faster than light by viewing gravity as a geometric phenomena due to curvature of space-time. In this article, the author supposes that gravity is not just a geometric effect. Like the other forces, it would be mediated by radiation -- radiation that would travel faster than the speed of light -- greater than or equal to 2x1010c actually.


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