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Undulatory   Listen
adjective
Undulatory  adj.  Moving in the manner of undulations, or waves; resembling the motion of waves, which successively rise or swell rise or swell and fall; pertaining to a propagated alternating motion, similar to that of waves.
Undulatory theory, or Wave theory (of light) (Opt.), that theory which regards the various phenomena of light as due to undulations in an ethereal medium, propagated from the radiant with immense, but measurable, velocities, and producing different impressions on the retina according to their amplitude and frequency, the sensation of brightness depending on the former, that of color on the latter. The undulations are supposed to take place, not in the direction of propagation, as in the air waves constituting sound, but transversely, and the various phenomena of refraction, polarization, interference, etc., are attributable to the different affections of these undulations in different circumstances of propagation. It is computed that the frequency of the undulations corresponding to the several colors of the spectrum ranges from 458 millions of millions per second for the extreme red ray, to 727 millions of millions for the extreme violet, and their lengths for the same colors, from the thirty-eight thousandth to the sixty thousandth part of an inch. The theory of ethereal undulations is applicable not only to the phenomena of light, but also to those of heat.






Collaborative International Dictionary of English 0.48








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"Undulatory" Quotes from Famous Books



... sometimes ran with violence after the dogs, and shortly after seemed with difficulty to ascend the rising hill; for the elasticity of so vast a body of ice of many leagues square, supported by a troubled sea, though in some places three or four yards in thickness, would in some degree occasion an undulatory motion, not unlike that of a sheet of paper accommodating itself to the surface of a rippling stream. Noises were likewise now distinctly heard in many directions like the report of cannon, owing to the bursting of the ice at ...
— The Moravians in Labrador • Anonymous

... moonlight night, the carriage made its way but very slowly, and after the lapse of two hours the travellers had arrived at a point about eight miles from the castle, at which the road strikes through a desolate and heathy flat, sloping up distantly at either side into bleak undulatory hills, in whose monotonous sweep the imagination beholds the heaving of some dark sluggish sea, arrested in its first commotion by some preternatural power. It is a gloomy and divested spot; there is neither tree ...
— The Purcell Papers - Volume I. (of III.) • Joseph Sheridan Le Fanu

... the beginning God, the Life in God, the Lord in God, the Holy Procedure, inhabited the dome, which, burning in magnificence primeval, and revolving in prismatic and undulatory spiral, appeared, and was the pavilion of the Spirit: In glory inexhaustible and inconceivable, in movement spherical, unfolded in ...
— Modern Spiritualism • Uriah Smith

... same appearances regularly recur at certain equal intervals of distance at the same time, and also present themselves at equal intervals of time at the same place; that in fact it belongs to the class of motions called by mathematicians undulatory or wave motions. The wave motion in this model (Powell's wave apparatus) results from the simple up and down motion popularly associated with the term wave. But when a mathematician calls a thing a wave he means that the disturbance is represented by a certain general ...
— Scientific American Supplement No. 275 • Various

... the kingbird, with a mincing and hovering flight; it tiptoes through the air. The woodpeckers gallop, alternately closing and spreading their wings. The ordinary flight of the goldfinch is a very marked undulatory flight; a section of it, the rise and the fall, would probably measure fifty feet. The bird goes half that distance or more with wings closed. This is the flight the male indulges in within hearing distance of his ...
— Under the Maples • John Burroughs


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