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Incidence   /ˈɪnsədəns/  /ˈɪnsɪdəns/   Listen
noun
Incidence  n.  
1.
A falling on or upon; an incident; an event; an occurrence. (Obs.)
2.
(Physics) The direction in which a body, or a ray of light or heat, falls on any surface. "In equal incidences there is a considerable inequality of refractions."
3.
The rate or ratio at which something occurs; as, the incidence of murder in Los Angeles; the incidence of cancer in men over 50.
Angle of incidence, the angle which a ray of light, or the line of incidence of a body, falling on any surface, makes with a perpendicular to that surface; also formerly, the complement of this angle.
Line of incidence, the line in the direction of which a surface is struck by a body, ray of light, and the like.






Collaborative International Dictionary of English 0.48








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"Incidence" Quotes from Famous Books



... the reality. Although a detailed examination of the question shows that the curvature of light rays required by the general theory of relativity is only exceedingly small for the gravitational fields at our disposal in practice, its estimated magnitude for light rays passing the sun at grazing incidence is nevertheless 1.7 seconds of arc. This ought to manifest itself in the following way. As seen from the earth, certain fixed stars appear to be in the neighbourhood of the sun, and are thus capable of observation during a total eclipse of the sun. At such times, these stars ought ...
— Relativity: The Special and General Theory • Albert Einstein

... and the infinitude of propositions it contains, remain potential and unapproachable until their incidence is found in existence. Form cannot of itself decide which of all possible forms shall be real; in their ideality, and without reference to their illustration in things, all consistent propositions would be equally ...
— The Life of Reason • George Santayana

... variety is indispensable, and he preserved the utmost freedom in some respects. He continually varies the stresses in the line, their number, their weight, and their incidence, letting them fall, when it pleases his ear, on the odd as well as on the even syllables of the line. The pause or caesura he permits to fall at any place in the line, usually towards the middle, but, on occasion, even after the first or ninth syllables. ...
— Milton • Sir Walter Alexander Raleigh

... thought he could draw from his experiment a firm conclusion on the point in dispute. He produced stationary waves with light polarized at an angle of 45 deg.,[22] and established that, when light is polarized in the plane of incidence, the fringes persist; but that, on the other hand, they disappear when the light is polarized perpendicularly to this plane. If it be admitted that a photographic impression results from the active ...
— The New Physics and Its Evolution • Lucien Poincare

... the leg of the born cavalier is before you: and obscure it as you will, dress degenerately, there it is for ladies who have eyes. You see it: or, you see he has it. Miss Isabel and Miss Eleanor disputed the incidence of the emphasis, but surely, though a slight difference of meaning may be heard, either will do: many, with a good show of reason, throw the accent upon leg. And the ladies knew for a fact that Willoughby's leg was exquisite; he had a cavalier court-suit in his wardrobe. ...
— The Shaving of Shagpat • George Meredith


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