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# Sidelights on Relativity

Two influential essays: "Ether and Relativity" (1920) discusses properties demanded of the ether of space by the theory of relativity; "Geometry and Experience" (1921) describes the limits within which the Euclidean or other practical geometric systems can be regarded as valid in connection with the concept of a finite universe.

ebook, 0 pages

Published
January 1st 2010
by MobileReference
(first published July 1st 1983)

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## Community Reviews

(showing 1-10)

Firstly, recounting the stumbling of Physical Science from Newton's theory to his own: the intrinsic relation of matter and energy; and how the influence of problems derived from Hertz's investigations in electro-dynamics made this possible, thanks to Lorentz through Maxwell's equations. Secondly, the fundamental question for the character of Mathematics as a valid description of reality -particularly in the f ...more

This short bit combines two lectures from the early 1920s answering some of the inherent queries on his recent work. The first deals with the idea of the "ether" which his work both discredited and, as he shows, retained in its essence. The second shows, remarkably, that you CAN envision a finite unbounded univ ...more

Nov 01, 2012
Squatting Erudite
rated it
it was amazing
·
review of another edition

Shelves:
physics,
informal-but-technical

Short but very interesting and surprisingly clear! It really brings out Einstein's ability to explain difficult concepts in a way which pretty much confirms one of his quotes:

"If you can't explain it to a six year old, you don't understand it yourself."

(At least I think he really said it, you can never be sure these days.)

"If you can't explain it to a six year old, you don't understand it yourself."

(At least I think he really said it, you can never be sure these days.)

*is probably best served to gluttons. (I count myself among them.) "Ether and Relativity" is his rebuttal of the idea of a universal "ether" through which things move, and "Geometry and Experience" applies the ideas of what was then the new geometry to the concept of a finite universe. Like I said...*

Sidelights on Relativity

Sidelights on Relativity

The are also a few more inclusively phrased nuggets of in ...more

*Cosmos*and

*The Demon-Haunted World*, and that made understanding Einstein's essays easier for me -- though it certainly wasn't a walk in the park. The popularization of Science really goes a long way into making hard concepts easier to di ...more

Overall: 4 of 5.

Most recommended, I dont have a maths or science background and you don't need one for this book.

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In 1879, Albert Einstein was born in Ulm, Germany. He completed his Ph.D. at the University of Zurich by 1909. His 1905 paper explaining the photoelectric effect, the basis of electronics, earned him the Nobel Prize in 1921. His first paper on Special Relativity Theory, also published in 1905, changed the world. After the rise of the Nazi party, Einstein made Princeton his permanent home, becoming
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“Is human reason, then, without experience, merely by taking thought, able to fathom the properties of real things. In my opinion the answer to this question is, briefly, this:--As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”
—
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