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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 in 1923 [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. [9]
In the preface to Relativity: The Special and the General Theory, Einstein said "The present book is intended, as far as possible, to give an exact insight into the theory of Relativity to those readers who, from a general scientific and philosophical point of view, are interested in the theory, but who are not conversant with the mathematical ...
In physics, gravity (from Latin gravitas 'weight' [1]) is a fundamental interaction primarily observed as mutual attraction between all things that have mass.Gravity is, by far, the weakest of the four fundamental interactions, approximately 10 38 times weaker than the strong interaction, 10 36 times weaker than the electromagnetic force and 10 29 times weaker than the weak interaction.
The first test of Newton's law of gravitation between masses in the laboratory was the Cavendish experiment conducted by the British scientist Henry Cavendish in 1798. [5] It took place 111 years after the publication of Newton's Principia and approximately 71 years after his death.
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 ...
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.
[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 ...