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Updated: June 14, 2025
Now, when the Nicols are parallel, the retardation of half a wave-length, or of any odd number of half wave-lengths, produces extinction; at all thicknesses, on the other hand, which correspond to a retardation of an even number of half wave-lengths, the two beams support each other, when they are brought to a common plane by the analyzer.
Now on the electronic theory of the constitution of matter which I have spoken of in the earlier part of this book, there is nothing impossible in this; on the contrary it is only the known Law of synchronous vibration carried into those further ranges of wave-lengths which, though not yet produced by laboratory experiment, are unavoidably recognized by the mathematicians.
For a long time we have known ultra-violet radiations still more rapid, and, on the other hand, infra-red ones more slow, while in the last few years the field of known radiations has been singularly extended in both directions. It is to M. Rubens and his fellow-workers that are due the most brilliant conquests in the matter of great wave-lengths.
In the case of the wireless telephone, owing to the thousands of separate wave-lengths required for the transmission of speech, the number of telephone conversations which may be carried on at the same time is still further restricted and is so small that all who can employ wires will find it necessary to do so, leaving the ether available for those who have no other means of communication.
The dusky flutings in the prismatic light of the first of these stars have not been identified with the absorption of any particular substance; but associated with them are metallic lines, of which 78 were measured, and a good many identified by Huggins, while the wave-lengths of 97 were determined by Vogel in 1871.
"The reactions of cell-elements to the doggerel punch of the wave-lengths of sunlight, the foundation of all folk-songs and rag-times. Terrence completes his circle right there and stultifies all his windiness. Now listen to me, and I will present " "But wait," Paula pleaded. "Mr. Graham argues that English puritanism barred music, real music, for centuries...." "True," said Terrence.
This interpretation can still, at this present moment, be maintained, and the researches of MM. Buisson, Righi, Lenard, and Merrit Stewart have even established that rays of very short wave-lengths produce on metallic conductors, from the point of view of electrical phenomena, effects quite analogous to those of the X rays.
The Master smiled again, as he realized his orders were going on with exact precision. "That's the wireless they're putting out of commission," thought he, glancing at his watch again. "No mere untuning of wave-lengths. Good, old-fashioned hammer-blows! This station won't work again for a while!" Bohannan, meantime, was trying to get some general impression of the giant plane.
The two physicists measured a standard length of about ten centimetres, first in terms of the wave-lengths of the red, green, and blue radiations of cadmium, and then in terms of the standard metre.
"How's that?" asked the Banner man, speaking for the others' evident interest. "We have no means of surmising the method by which this man succeeds in arresting vibratory motions of certain wave-lengths," said Eldridge didactically, "any more than we are able to define the precise nature of electricity. But, as in the case of electricity, we can observe the action of its phenomena.
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