 | John Tyndall - 1867 - 404 páginas
...the most cogent proof of that theory being based upon .the fact that, by adding light to light, we may produce darkness, just as we can produce silence by adding sound to sound. During the vibration of a tuning-fork the distance between its two prongs is alternately increased... | |
 | John Tyndall - 1867 - 372 páginas
...light, the most cogent proof of that theory being based upon the fact that, by adding light to light, we may produce darkness, just as we can produce silence by adding sound to sound. During the vibration of a tuning-fork the distance between its two prongs is alternately increased... | |
 | Alexander Wilford Hall - 1880 - 544 páginas
...theory being based upon the fact that by adding light to light we may produce darkness, just as ne can produce silence by adding sound to sound."—...few moments, that this whole matter, as regards the dbublc siren, is a clear misapprehension on the part of these writers, and that no such effects as... | |
 | Marcellus John Thompson - 1887 - 232 páginas
...light, the most cogent proof of that theory being based upon the fact that, by adding light to light, we may produce darkness, just as we can produce silence by adding sound to sound. " During the vibration of a tuning-fork the distance between the two prongs is alternately increasing... | |
 | William Ellsworth Hermance - 1912 - 478 páginas
...sound, the most cogent proof of that theory being based upon the fact that, by adding light to light, we may produce darkness, just as we can produce silence by adding sound to sound. Did not most authors use practically this same language we might call it a lie, for no lie could be... | |
 | 1891 - 588 páginas
...light, the most cogent proof of that theory being based on the fact that, by adding light to light we may produce darkness, just as we can produce silence by adding sound to sound.'' * There are many very interesting experiments illustrative of this law, but want of space prevents... | |
 | 1892 - 724 páginas
...produces absolute silence. " (On Sound, p. 384, 3d ed.) "Thus," he says, "by adding light to light we can produce darkness, just as we can produce silence by adding sound to sound." (Ib. 358.) Again, in describing the adaptation of the double syren, as a mechanical instrument for... | |
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We have here a phenomenon which, above all others, characterises wave-motion. It was this phenomenon, as manifested in optics, that led to the undulatory theory of light, the most cogent proof of that theory being based upon .the fact that, by adding... 