General Relativity - Trevor Underwood

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Résumé :
This volume provides annotated translations of the primary sources leading up to Einstein's theory of general relativity, in which Einstein attempted to extend his theory of special relativity beyond space and time, to include matter and gravitational fields, by introducing gravity through his equivalence principle - the equivalence of gravity and acceleration. This resulted in Einstein rejecting the second postulate of his theory of special relativity - the postulate on the constancy of the speed of light - in the presence of a gravitational field. This review reveals that Einstein's theory of general relativity it is not a theory of gravity...

Biographie:
Trevor Underwood was born in England in 1943, and became a US citizen in 2004. He earned a M.A. in mathematics and physics at Cambridge University, in 1965, and a M.Sc. in economics at the London School of Economics in 1967, followed by further graduate studies in international economics at the University of Rochester, NY, and at Harvard University, between 1967 and 1969. He worked for the Bank of England, the International Monetary Fund, and the UK Treasury and was a UK Advisor to the Committee of Twenty on Reform of the International Monetary System, between 1969 and 1973. He founded a treasury consultancy business in 1974 and a treasury software company in 1976, which he continued to run until 2017. In 2008 he returned to scientific research, initially on human evolution. In November 2015, he published a paper A new model of human dispersal on bioRxiv.org, the online preprint archive for biology run by Cold Spring Harbor Laboratory. Between December 2015 and November 2019, he worked on climate science, during which time he wrote six climate science papers. In November 2019, these were published in a book The Surface Temperature of the Earth, distributed by Lulu.com. He then returned to theoretical physics to review progress since he left Cambridge in 1965, in particular on electromagnetic radiation, matter and gravity. In December 2021, he published a spin-off from this research, Urbain Le Verrier on the Movement of Mercury - annotated translations, distributed by Lulu.com. In April 2023, he published Quantum Electrodynamics - annotated sources. Volumes I and II...

Sommaire:
it is a relativistic theory about the effects of gravitation, or more strictly, of a uniformly accelerated reference frame. There is nothing in any version of this theory that represents or explains or provides any connection to the weak attractive gravitational force between matter. In order to make calculations with his theory, Einstein had to import Newton's empirical law of gravitation. Consequently, the only evidence that Einstein could provide for his theory of general relativity was effectively Newtonian. Part I reviews Newton's laws of motion and of gravitation, his definitions of inertial and gravitational mass, and his equivalence principle, which provide the background to Einstein's theory. Part II provides a detailed analysis of the development of Einstein's theory of general relativity. Part III provides a postscript on subsequent developments. In the light of the continued failure of Einstein's efforts to overcome the main objections to his theory of special relativity - the Ehrenfest paradox, and its failure to explain the observed Doppler redshift and blueshift of light - or to provide any evidence for it, and in the absence of any supportive evidence for his theory of general relativity, both theories must be rejected until such objections are overcome and such evidence is provided. The Second Edition includes extracts from two more papers by Einstein, published in 1933 and 1945, in which Einstein questioned the validity of General Relativity, recognizing his introduction of mass into the field equations through the Euler equation as a temporary expedient. He investigated an alternative theory in which the possibility of an atomistic theory of matter and electricity which makes use of no other variables than the g?? of the general relativity theory and the ?? of the Maxwell theory....