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Sir John
Waves and Ripples in Water, Air, and Aether
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2231746Waves and Ripples in Water, Air, and Aetherhttps://www.gandhi.com.mx/waves-and-ripples-in-water-air-and-aether/phttps://gandhi.vtexassets.com/arquivos/ids/2032839/a5d0371a-e969-486c-bca8-ef868c94ae84.jpg?v=638345432754600000102102MXNLibrary of AlexandriaInStock/Ebooks/2191295Waves and Ripples in Water, Air, and Aether102102https://www.gandhi.com.mx/waves-and-ripples-in-water-air-and-aether/phttps://gandhi.vtexassets.com/arquivos/ids/2032839/a5d0371a-e969-486c-bca8-ef868c94ae84.jpg?v=638345432754600000InStockMXN99999DIEbook20239781465683250_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9781465683250_<p>We have all stood many times by the seashore, watching the waves, crested with white foam, roll in and break upon the rocks or beach. Every one has more than once cast a stone upon still water in a lake or pond, and noticed the expanding rings of ripples; and some have voyaged over stormy seas, whereon great ships are tossed by mighty billows with no more seeming effort than the rocking of a cradle. In all these things we have been spectators of a wave-motion, as it is called, taking place upon a water surface. Perhaps it did not occur to us at the time that the sound of the splash or thunder of these breaking waves was conveyed to our ears as a wave-motion of another sort in the air we breathe, nay, even that the light by which we see these beautiful objects is also a wave-motion of a more recondite description, produced in a medium called thether, which fills all space. A progressive study of Nature has shown us that we are surrounded on all sides by wave-motions of various descriptionswaves in water, waves in air, and waves in therand that our most precious senses, our eyes and ears, are really wave-detectors of a very special form. The examination of these waves and their properties and powers has led us to see that waves in water, air, and ther, though differing greatly in detail, have much in common; and many things about them that are difficult to understand become more intelligible when we compare these various wave-motions together. In these lectures, therefore, I shall make use of your familiar experiences concerning sea and water waves to assist you to understand some of the properties of air waves to which we owe our sensations of sound and music; and, as far as possible, attempt an explanation of the nature of ther waves, created in the all-pervading ther, to which are due not only light and sight, but also many electrical effects, including such modern wonders as wireless telegraphy. In all departments of natural science we find ourselves confronted by the phenomena of wave-motion. In the study of earthquakes and tides, telegraphs and telephones, as well as terrestrial temperature, no less than in the examination of water waves and ripples, sound, music, or light and heat, we are bound to consider waves of some particular kind. Fastening our attention for the moment on surface water waves, the first question we shall ask ourselves isWhat is a wave? If we take our station on a high cliff looking down on the sea, on some clear day, when the wind is fresh, we see the waves on its surface like green rounded ridges racing forward, and it appears at first sight as if these elevations were themselves moving masses of water. If, however, we look instead at some patch of seaweed, or floating cork, or seagull, as each wave passes over it, we shall notice that this object is merely lifted up and let down again, or, at most, has a small movement to and fro. We are led, therefore, to infer that, even when agitated by waves, each particle of water never moves far from its position when at rest, and that the real movement of the water is something very different from its apparent motion. If we place on the surface of water a number of corks or pieces of paper, and then watch them as a wave passes over them, we shall notice that the corks or bits of paper rise and fall successively, that is, one after the other, and not all together.</p>...9781465683250_Library of Alexandrialibro_electonico_ad939f7d-6276-3b4d-8e50-b918b20c8911_9781465683250;9781465683250_9781465683250Sir JohnInglésMéxicohttps://getbook.kobo.com/koboid-prod-public/markmoxford-epub-9c192ccc-7ceb-420c-99ac-f548a4a6d985.epub2023-02-14T00:00:00+00:00Library of Alexandria