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Edgardo said:The website
Relativity on the World Wide Web
by Chris Hillman
contains a large collection of links to relativity websites and lecture notes
on the level of introductory as well as advanced.
explain said:http://www.theorie.physik.uni-muenchen.de/~serge/T7/" .
The theory of General Relativity is a cornerstone of modern physics that was developed by Albert Einstein in the early 20th century. It is a mathematical framework that describes the behavior of gravity and the structure of spacetime.
Newton's theory of gravity, also known as classical mechanics, describes gravity as a force between masses. General Relativity, on the other hand, explains gravity as the curvature of spacetime caused by the presence of mass and energy.
Some key concepts in General Relativity include spacetime, gravity as curvature, the equivalence principle, and the geodesic equation. These concepts help us to understand the behavior of objects in the presence of massive bodies and the structure of the universe.
General Relativity has been confirmed through various observational and experimental tests, such as the precession of Mercury's orbit, the bending of light around massive objects, and the detection of gravitational waves. All of these tests have provided evidence that supports the predictions of General Relativity.
General Relativity has several practical applications, including GPS technology, which requires correcting for the effects of gravity on time dilation. It also plays a crucial role in astrophysics, helping us to understand the behavior of objects like black holes and the expansion of the universe.