CONCAVE • DICCIONARIO INGLES.COM • Definition of Concave

"Concave" Quotes from Famous Books

... of artificialities; for they are a part of a horticultural whole. To walk into a Japanese garden is like wandering of a sudden into one of those strange worlds we see reflected in the polished surface of a concave mirror, where all but the observer himself is transformed into a fantastic miniature of the reality. In that quaint fairyland diminutive rivers flow gracefully under tiny trees, past mole-hill mountains, till they fall at last into lilliputian lakes, almost smothered for the flowers that ...

— The Soul of the Far East • Percival Lowell

... concave profile in sick suspicion. Was the trail of the serpent over them all? But no, Uncle Joe was beaming mildly with the satisfaction of having shown that although the literary hemisphere was the unknown land, he had heard of a mountain and a minor elevation ...

— The Wit and Humor of America, Volume V. (of X.) • Various

... less false, more and more nearly true "ideas" about the phenomenon. The "ideas" are reflexes of the phenomenon, reflected in our midst as in a mirror; the reflexes may be distorted, as in a convex or concave mirror, but they suggest an ideal reflex valid in infinity. It is of the utmost importance to realize that the words which are used to express the ideas and the ideals are THE MATERIALIZATION of the ideas and ideal; it is only by words that we are enabled to give to other human beings ...

— Manhood of Humanity. • Alfred Korzybski

... focus. If, however, the supposed plane surface proves to be convex, the image will not be sharply defined in the telescope until the eyepiece is moved away from the object glass; while if the converse is the case, and the supposed plane is concave, the eyepiece must now be moved toward the objective in order to obtain a sharp image, and the amount of convexity or concavity may be known by the change in the focal plane. If the surface has periodic or irregular errors, no sharp image can be obtained, ...

— Scientific American Supplement, No. 484, April 11, 1885 • Various

... isochronism of the pendulum, followed by Huyghens's adaptation of that principle to clocks, has been one of the greatest aids to accurate observation. About the same time an equally beneficial step was the employment of the telescope as a pointer; not the Galilean with concave eye-piece, but with a magnifying glass to examine the focal image, at which also a fixed mark could be placed. Kepler was the first to suggest this. Gascoigne was the first to use it. Huyghens used a metal strip of variable width in the focus, as ...

— History of Astronomy • George Forbes

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