The Meaning of Relativity Quotes
Albert Einstein, Physics books
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“Some try to explain Hubble's shift of spectral lines by means other than the Doppler effect. There is, however, no support for such a conception in the known physical facts.”
“Einstein, Albert (1950), The Meaning of Relativity, (3rd ed.) place: Princeton, publisher: Princeton University Press, OCLN: 1304366”
“Einstein, Albert (1945), The Meaning of Relativity, (2nd ed.) place: Princeton, N.J., publisher: Princeton University Press, OCLN: 1105547540”
“Einstein, Albert (1953), The Meaning of Relativity: Including the Generalization of Gravitation Theory, (4th ed.) place: Princeton, N.J., publisher: Princeton University Press, OCLN: 946162394”
“Einstein, Albert; Adams, Edwin Plimpton (1922), The Meaning of Relativity: Four Lectures Delivered at Princeton Univ., May, 1921, (1st ed.) place: London, publisher: Methuen Publishing, OCLN: 637254801”
“Before the development of the theory of relativity it was known the principle of energy and momentum could be expressed in a differential form for the electromagnetic field. The four-dimensional formulation of these principles leads to an important conception, that of the energy tensor, which is important of the further development of the theory of relativity.”
“A material particle upon which no force acts moves, according to the principle of inertia, uniformly in a straight line. In the four-dimensional continuum of the special theory of relativity (with real time co-ordinate) this a real straight line. The natural, that is, the simplest, generalization of the straight line which is meaningful in the system of concepts of the general (Riemannian) theory of invariants is that of the straightest, or geodesic, line.”
“One can give good reasons why reality cannot at all be represented by a continuous field. From the quantum phenomena it appears to follow with certainty that a finite system of finite energy can be completely described by a finite set of numbers (quantum numbers). This does not seem to be in accordance with a continuum theory, and must lead to an attempt to find a purely algebraic theory for the description of reality. But nobody knows how to obtain the basis of such a theory.”
“The theory of relativity is intimately connected with the theory of space and time. I shall therefore begin with a brief investigation of the origin of our ideas of space and time, although in doing so I know that I introduce a controversial subject. The object of all science, whether natural science or psychology, is to co-ordinate our experiences and to bring them into a logical system. How are our customary ideas of space and time related to the character of our experience?”
“In May 1921 Albert Einstein delivered a series of lectures at Princeton University on the broad topic of relativity. The lectures form a unified survey of the basic concepts of relativity. Beginning with the pre-relativity physics of Newton (or perhaps, more correctly, the "three dimensional" relativity of Newton) Einstein lays the foundation for "four dimensional" relativity primarily from the postulational standpoint. The development of special relativity is followed by the formulation of the general theory leading up to the Schwarzschild line element and the cosmological problem.”
“A little reflection will show that the law of the equality of the inertial and gravitational mass is equivalent to the assertion that the acceleration imparted to a body by a gravitational field is independent of the nature of the body. For Newton's equation of motion in a gravitational field, written out in full, it is:
(Inertial mass) (Acceleration) (Intensity of the gravitational field) (Gravitational mass).
It is only when there is numerical equality between the inertial and gravitational mass that the acceleration is independent of the nature of the body.”
“Einstein, Albert (1955), The meaning of relativity: including the relativistic theory of the non-symmetric field, place: Princeton, publisher: Princeton University Press, ISBN: 9780691080079, OCLN: 177301011
• The Meaning of Relativity 5th edition at Princeton University Press
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