The Origin, Nature, and Influence of Relativity: Lowell Institute Lectures, Lowell Institute--Boston, and Los Angeles Lectures, University of California-Southern Branch

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Macmillan, 1925 - 185 Seiten
 

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Seite 11 - Absolute, true, and mathematical time, of itself, and from its own nature, flows equably without relation to anything external, and by another name is called duration...
Seite 12 - It is indeed a matter of great difficulty to discover, and effectually to distinguish, the true motions of particular bodies from the apparent; because the parts of that immovable space, in which those motions are performed, do by no means come under the observation of our senses.
Seite 11 - IV. Absolute motion is the translation of a body from one absolute place into another; and relative motion, the translation from one relative place into another.
Seite 13 - Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
Seite 15 - Faraday, in his mind's eye, saw lines of force traversing all space where the mathematicians saw centres of force attracting at a distance : Faraday saw a medium where they saw nothing but distance : Faraday sought the seat of the phenomena in real actions going on in the medium, they were satisfied that they had found it in a power of action at a distance impressed on the electric fluids.
Seite 11 - Absolute space, in its own nature, without relation to anything external, remains always similar and immovable. Relative space is some movable dimension or measure of the absolute spaces; which our senses determine by its position to bodies; and which is commonly taken for immovable space...
Seite 3 - Moreover, practical urgency as well as merest curiosity led them to estimate with considerable accuracy the ratio of the distance around a circle to the distance across it.
Seite 70 - And, if it were desired to deal directly with the assemblage of atoms and electric charges constituting it, the vibrational properties would appear as average effects of enormously complicated interactions of very large numbers of elements. Hence, even here, the reality is found to be so complicated as to be beyond the power of man to conceive adequately. Simplicity and unity in the fundamental processes and yet an infinite complexity in their combinations seem more and more to be clearly manifested...
Seite 104 - ... that of light ; and yet the velocity of the last particle relative to the first will still be less than that of light. The mathematical formulas justify this remarkable conclusion. Is MASS CONSTANT? In classical physics mass is a constant. If a force, say, equal to only one pound, is constantly exerted on a pound of matter in empty space, its velocity will exceed that of light by the end of a year. But this cannot happen in the theory of relativity, since no velocity can exceed that of light.
Seite 4 - FIG. 4. different colors. Despite persistent efforts, the truth of this conjecture has not yet been established, although five colors are known to be enough. Of like intriguing simplicity is the question raised a few years ago by the Japanese mathematician Kakeya as to the least area within which a line of given length can be turned around in a plane. An area only half as great as that of the circle with this length for diameter will suffice. No one has as yet been able to prove that this is the...

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