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Gravitation is a widely adopted textbook on Albert Einstein's general theory of relativity, written by Charles W. Misner, Kip S. Thorne, and John Archibald Wheeler. It was originally published by W. H. Freeman and Company in 1973 and reprinted by Princeton University Press in 2017.
Newton–Cartan theory (or geometrized Newtonian gravitation) is a geometrical re-formulation, as well as a generalization, of Newtonian gravity first introduced by Élie Cartan [1] [2] and Kurt Friedrichs [3] and later developed by G. Dautcourt, [4] W. G. Dixon, [5] P. Havas, [6] H. Künzle, [7] Andrzej Trautman, [8] and others.
Dennis Sciama [8] and Tom Kibble [9] independently revisited the theory in the 1960s, and an important review was published in 1976. [ 10 ] Einstein–Cartan theory has been historically overshadowed by its torsion-free counterpart and other alternatives like Brans–Dicke theory because torsion seemed to add little predictive benefit at the ...
A simplified version of this is embodied in Einstein's elevator experiment, illustrated in the figure on the right: for an observer in an enclosed room, it is impossible to decide, by mapping the trajectory of bodies such as a dropped ball, whether the room is stationary in a gravitational field and the ball accelerating, or in free space ...
Jefimenko, Oleg (2006), Gravitation and Cogravitation: Developing Newton's Theory of Gravitation to its Physical and Mathematical Conclusion, Star City: Electret Scientific Company, ISBN 0-917406-15-X; Electromagnetic Retardation and Theory of Relativity: New Chapters in the Classical Theory of Fields, 2nd ed., Electret Scientific, Star City, 2004.
[55] [b] They attributed the motion of objects to an impetus (akin to momentum), which varies according to velocity and mass; [55] Buridan was influenced in this by Ibn Sina's Book of Healing. [1] Buridan and the philosopher Albert of Saxony ( c. 1320 – c. 1390 ) adopted Abu'l-Barakat's theory that the acceleration of a falling body is a ...
1921 – Theodor Kaluza demonstrates that a five-dimensional version of Einstein's equations unifies gravitation and electromagnetism. [81] This idea is later extended by Oskar Klein. [82] 1922 – Alexander Friedmann derives the Friedmann equations. [83] [43] 1922 – Enrico Fermi introduces the Fermi coordinates.
Newton would need an accurate measure of this constant to prove his inverse-square law. When Newton presented Book 1 of the unpublished text in April 1686 to the Royal Society, Robert Hooke made a claim that Newton had obtained the inverse square law from him, ultimately a frivolous accusation. [8]: 204