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Category Archives: Cosmology
Neutrinos faster than light.
Recently experiment has shown that neutrinos move faster then light. Some claim that “neutrinos might break one of the most fundamental laws of physics”. The question would be “what law of physics would be broken?” In general this all is … Continue reading
Posted in Cosmology, Physics, Relativity, Special Relativity, Universe
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The escape velocity for the Schwarzschild metric (2).
In the other post The escape velocity for the Schwarzschild metric. we have found the escape velocity , however – this was based on the limit and . Let us return to the radialequation for the Schwarzschild metric given by … Continue reading
Posted in Cosmology, General Relativity, Mathematics, Physics, Relativity, Universe
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Kerr metric and dragging.
The Kerrmetric is given by , where and . We solve the geodesic equation using It is clear that , then for we obtain the equation So there is a solution . Next we look to the equation for and … Continue reading
Posted in Cosmology, General Relativity, Mathematics, Physics, Relativity
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The universe as a sphere.
Consider a uniform sphere that has mass and radius . The gravitational energy of an isotropic sphere is given by so using we obtain The energy is given by and defining we obtain where . So Using we can write … Continue reading
Posted in Cosmology, Mathematics, Physics, Relativity, Universe
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