AS is well known, Einstein's special theory of relativity rests on two postulates: (1) the postulate of relativity; (2) the postulate of constant light velocity, which says 1 “that light is always ...

For over 100 years, two theories have shaped our understanding of the universe: quantum mechanics and Einstein’s general relativity. One explains the tiny world of particles; the other describes ...

A hundred years ago, Albert Einstein published his theory of relativity. On this occasion, Euronews’ Space magazine plunges into the subject of gravitational waves and features the joint ESA-NASA ...

Robert V. Pound, professor of Physics, has proved a fundamental postulate of Einstein's theory of relativity. He has confirmed the Principle of Equivalence, which says that the observable effects of ...

Einstein and Rosen 1 have admitted that the geodesic postulate is an extraneous one and that the field-equations of gravitation must give both matter and motion independently of such a postulate. It ...