Einstein, Albert, 1879-1955 / 2008-07-05 00:00:00

EBOOK SIDELIGHTS ON RELATIVITY ***


Produced by David Starner, William Fishburne
and the Online Distributed Proofreading Team.


SIDELIGHTS ON RELATIVITY
By Albert Einstein
Contents
ETHER AND THE THEORY OF RELATIVITY
An Address delivered on May 5th, 1920, in the University of Leyden
GEOMETRY AND EXPERIENCE
An expanded form of an Address to the Prussian Academy of Sciences
in Berlin on January 27th, 1921.


ETHER AND THE THEORY OF RELATIVITY
An Address delivered on May 5th, 1920, in the University of Leyden

How does it come about that alongside of the idea of ponderable
matter, which is derived by abstraction from everyday life, the
physicists set the idea of the existence of another kind of matter,
the ether? The explanation is probably to be sought in those phenomena
which have given rise to the theory of action at a distance, and
in the properties of light which have led to the undulatory theory.
Let us devote a little while to the consideration of these two
subjects.
Outside of physics we know nothing of action at a distance.
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