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Title: Relativity: The Special and General Theory
Author: Albert Einstein
Book Type: Science
Language: English
Format: Paperback
General relativity, formulated by Albert Einstein in 1915, is a fundamental theory of gravitation in modern physics. It represents the current understanding of how gravity works. This theory builds upon both special relativity and Newton's law of universal gravitation, offering a comprehensive framework that defines gravity as a geometric property of spacetime. This means that the curvature of spacetime is directly linked to the mass-energy and momentum of objects present.
The relationship between spacetime curvature and matter is described by the Einstein field equations, a set of complex partial differential equations. General relativity has far-reaching implications in astrophysics. For instance, it predicts the existence of black holes—regions in space where the fabric of spacetime is so distorted that nothing, not even light, can escape. These black holes are formed as an endpoint for massive stars.
The theory has been supported by evidence and has significant consequences for our understanding of the cosmos. Stellar black holes, as well as larger variations, are believed to be responsible for emitting intense radiation from astronomical objects such as active galactic nuclei and microquasars. Overall, general relativity has revolutionized our comprehension of gravity, spacetime, and the behavior of massive celestial bodies.
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