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Updated: May 22, 2025
A sweep of his clenched fist knocked the ultra-violet sender and its coils and mirrors in a tinkling crash to the grid at my feet. "We don't need that, whatever it is!" He rubbed his knuckles where the violet waves had tinged them, and turned grimly back to Snap. "Where are your ray mirrors? If the treasure lies exposed " This Martian's knowledge was far greater than we believed.
His outer screen was already down, although its mighty copper generator was exerting its utmost power. Black areas had already appeared and were spreading rapidly, where there should have been only incandescent radiance; and the inner screen was even now radiating far into the ultra-violet and was certainly doomed.
But there are various ways in which a gas may be changed so as to become a conductor; for example, by contact with incandescent metals or with flame, or by treating with ultra-violet light, with Rôntgen rays, or with the rays of a radio-active substance. Now the all-important question is as to just what change has taken place in the gas so treated to make it a conductor of electricity.
Too much of them may be destructive even to life itself." Prescott had now paused and was regarding Kennedy contemptuously. Kennedy paid no attention, but continued: "Perhaps these mysterious rays may shed some light on our minds, however. Now, for one thing, ultra-violet light passes readily through quartz, but is cut off by ordinary glass, especially if it is coated with chromium. Old Mr.
I have stated that our actual commercial application of the etheric waves extends from the ultra-violet waves used in photography, and measuring only 1/254,000 of an inch, to those measuring many miles employed in wireless telegraphy; but this practical application by no means exhausts the conceivable possibilities of etheric vibrations; for not only do we find a gap of five octaves of as yet unknown waves between the dark heat group and the Hertzian group, but mathematically there is no limit to the greatness or smallness of the waves, and the scale may be prolonged indefinitely in either direction.
Its visible portion covers a range of about one octave; bolometric indications already in 1884 comprised between three and four. The great importance of the newly explored region appears from the fact that three-fourths of the entire energy of sunlight reside in the infra-red, while scarcely more than one-hundredth part of that amount is found in the better known ultra-violet space.
They've given us light, both ultra-violet and visible, sound, infra-sound, and electricity I don't know what's left unless they give us a new kind of X-rays, or Hertzian, or infra-red heat waves, or...." "That's it, heat!" exclaimed Seaton. "They produce heat by means of powerful wave-generators and by setting up heavy induced currents in the armor. They can melt arenak that way."
With Holden giving honest guesses at the color of the sunlight, and its probable ultra-violet content, and with careful estimates of the exactness with which burning vegetation here smelled like Earth-plants, they arrived at imprecise but common sense conclusions.
As though the musicians were not nearly so much playing the little phrase as performing the rites on which it insisted before it would consent to appear, as proceeding to utter the incantations necessary to procure, and to prolong for a few moments, the miracle of its apparition, Swann, who was no more able now to see it than if it had belonged to a world of ultra-violet light, who experienced something like the refreshing sense of a metamorphosis in the momentary blindness with which he had been struck as he approached it, Swann felt that it was present, like a protective goddess, a confidant of his love, who, so as to be able to come to him through the crowd, and to draw him aside to speak to him, had disguised herself in this sweeping cloak of sound.
It was a howl of such loss, and of such unspeakable rage, that the hair at the back of Tommy's neck lifted, as a dog's hackles lift at sight of an enemy. "Keep your head down, Evelyn," said Tommy composedly. "I have an idea that the burning stuff gives off a lot of ultra-violet. Von Holtz was badly burned, you remember." Naked figures flashed forward from the jungle beyond the burned area.
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