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The result showed that the blue end suffered far more than the red, absorption varying inversely as wave-length. This property of stopping predominantly the quicker vibrations is shared, as both Vogel and Langley have conclusively shown, by the solar atmosphere.
Thus, for instance, in the case of the quartz, in the neighbourhood of a radiation corresponding to a wave-length of 8.5 microns, the absorption is thirty times greater in the region of the band than in the neighbouring region, and consequently, after three reflexions, while the corresponding radiations will not have been weakened, the neighbouring waves will be so, on the contrary, in the proportion of 1 to 27,000.
In both cases the undulations are shortened when they enter the gypsum, but in the one case they are more shortened than in the other. You can readily imagine that in this way the one system of waves may get half a wave-length, or indeed any number of half wavelengths, in advance of the other. The possibility of interference here at once flashes upon the mind.
And even less cordial was the reception given the same thinker's theory, put forward in 1863, that the ethereal undulations producing the phenomenon we call light differ in no respect except in their wave-length from the pulsations of electro-magnetism.
This feature added immensely to the sensitiveness of the set. It consisted of a coil, variously known as the tickler, the intensity coil, and the regeneration coil. It involved three controls, the wave-length tuning, the regenerative coil, and the filament rheostat.
Fourth-order rays have been investigated quite thoroughly, but only mathematically and theoretically, as they are of excessively short wave-length and are capable of being generated only by the breaking down of matter itself into the corresponding particles. However, it has been shown that they are quite similar to protelectricity in their general behavior.
But he settled down with the communicator to make the attempt. He called first on a GC wave-length and form. It was unlikely that blueskins would use general-communication bands to keep in touch with each other, but it had to be tried. He broadcast, as broadly tuned as possible, and went up and down the GC spectrum, repeating his warning painstakingly and listening without hope for a reply.
"I'll send them out by the doctor in the morning," said the forester. Charley showed Mrs. Morton how to wire the cells and couple them to the instruments. Then he told her how to adjust her spark-gap and tune the instrument to any given wave-length. He compared his watch with the clock on the wall. "At eight o'clock every night," he said, "I will call you up. Suppose you take Mr.
The only point which will detain us is the important question as to the nature of the X rays themselves; the properties which have just been brought to mind are those which appear essential and which every theory must reckon with. The most natural hypothesis would be to consider the rays as ultra-violet radiations of very short wave-length, or radiations which are in a manner ultra-ultra-violet.
Instead of 5,317, its true wave-length proved to be 5,303 ten millionths of a millimetre; nor does it make any show by absorption in dispersed sunlight. The originating substance, designated "coronium," of which nothing is known to terrestrial chemistry, continues luminous at least 300,000 miles above the sun's surface, and is hence presumably much lighter even than hydrogen.
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