Definition of Incidince
In"ci*dence (?), n. [Cf. F.
incidence.]
1. A falling on or upon; an incident; an
event. [Obs.] Bp. Hall.
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. Sir I. Newton.
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.
- Webster's Unabridged Dictionary (1913)
- the rate or range of occurrence or influence of something, especially of something unwanted: the high incidence of heart disease in men over 40.
- a falling upon, affecting, or befalling; occurrence.
- (Optics) (Physics) a. the striking of a ray of light, beam of electrons, etc., on a surface, or the direction of striking. b. see angle of incidence (def. 1).
- the fact or the manner of being incident
- (geometry) partial coincidence of two figures, as of a line and a plane containing it.
French
- incidence
- The Nuttall Encyclopedia
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