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General relativity is a theory of gravitation developed by Einstein in the years 1907–1915. The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field (for example, when standing on the surface of the Earth) are physically identical.
In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein 's 1905 paper, On the Electrodynamics of Moving Bodies , the theory is presented as being based on just two postulates : [ p 1 ] [ 1 ] [ 2 ]
General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.
In the remainder of Einstein's 1911 paper, he discussed the bending of light rays in a gravitational field, but given the incomplete nature of Einstein's theory as it existed at the time, the value that he predicted was half the value that would later be predicted by the full theory of general relativity. [27] [28]
Introducing Relativity is a 2002 graphic study guide to the theory of relativity and Albert Einstein written by Bruce Bassett and illustrated by Ralph Edney. The volume is, according to the publisher's website, "a superlative, fascinating graphic account of Einstein’s strange world," which, "plots a visually accessible course through the thought experiments that have given shape to ...
Einstein's theory predicts a more complicated curve: the planet behaves as if it were travelling around an ellipse, but at the same time, the ellipse as a whole is rotating slowly around the star. In the diagram on the right, the ellipse predicted by Newtonian gravity is shown in red, and part of the orbit predicted by Einstein in blue.
It’s no secret, Albert Einstein was a bonafide genius, but even geniuses get it wrong sometimes. Scientists challenge Einstein's theory on speed of light Skip to main content
Einstein's special theory is not the only theory that combines a form of light speed constancy with the relativity principle. A theory along the lines of that proposed by Heinrich Hertz (in 1890) [17] allows for light to be fully dragged by all objects, giving local c-constancy for all physical observers.