To suppose, as is sometimes done in optical speculations, that a train of simple waves may begin at a given epoch, continue for a certain time involving it may be a large number of periods, and ultimately cease, is a contradiction in terms. The Theory of Soundby John William Strutt Baron Rayleigh - 1894 - 984 pagesSnippet view
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Van L. Lawrence - Medicine - 1949 - 244 pages
...that arises is as to the character of absolutely simple waves ; and here "it may be well to emphasize that a simple vibration implies infinite continuance,...and ultimately cease, is a contradiction in terms*." A like contradiction is involved if we speak of unpolarized light as homogeneous, really homogeneous...