Modes of Motion Or Mechanical Conceptions of Physical Phenomena
Modes of Motion Or Mechanical Conceptions of Physical Phenomena
A E Amos Emerson Dolbear
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If the fork were of atomic magni- tude, and should swing its sides one-half the diameter of the atom, or, say, the hundred mil- lionth of an inch, the translational velocity would be equivalent to about eighty miles a second, or a hundred and fifty times the velocity of a can- non-ball, which may be reckoned at about 3, 000 feet per second. That atoms really vibrate at the above rate per second is very, certain ; for their vibrations ATOMIC VIBRATIONS 51 produce ether-waves, the length of which... may be accurately measured. When a tuning-fork vibrates 500 times a second, and the sound travels 1, 000 feet in the same interval, the length of each wave will be found by dividing the velocity in the air by the number of vibra- tions, or 1, 100/500=2. 2 feet. In like manner, when one knows the velocity and wave length he may compute the number of vibrations by dividing the velocity by the wave length. Now, the velocity of the waves called light is 186, 000 miles a second, and a light-wave may be one forty thousandth of an inch long.
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