Line of incidence
Incidence In"ci*dence, n. [Cf. F. incidence.] [1913 Webster] 1. A falling on or upon; an incident; an event; an occurrence. [Obs.] --Bp. Hall. [1913 Webster]

2. (Physics) The direction in which a body, or a ray of light or heat, falls on any surface. [1913 Webster]

In equal incidences there is a considerable inequality of refractions. --Sir I. Newton. [1913 Webster]

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. [PJC]

{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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • line of incidence — direction of contact …   English contemporary dictionary

  • line of arrival — kritimo linija statusas T sritis Gynyba apibrėžtis Sviedinio trajektorijos liestinė sprogimo taške. atitikmenys: angl. line of arrival; line of impact pranc. ligne d’incidence …   NATO terminų aiškinamasis žodynas

  • line of impact — kritimo linija statusas T sritis Gynyba apibrėžtis Sviedinio trajektorijos liestinė sprogimo taške. atitikmenys: angl. line of arrival; line of impact pranc. ligne d’incidence …   NATO terminų aiškinamasis žodynas

  • Angle of incidence — Incidence In ci*dence, n. [Cf. F. incidence.] [1913 Webster] 1. A falling on or upon; an incident; an event; an occurrence. [Obs.] Bp. Hall. [1913 Webster] 2. (Physics) The direction in which a body, or a ray of light or heat, falls on any… …   The Collaborative International Dictionary of English

  • Angle of incidence — is a measure of deviation of something from straight on , for example: in the approach of a ray to a surface, or the angle at which the wing or horizontal tail of an airplane is installed on the fuselage, measured relative to the axis of the… …   Wikipedia

  • angle of incidence — i. The acute angle formed between the chord line of an airfoil and the longitudinal axis of the aircraft on which it is mounted. This is the angle at which the airfoil is attached to an aircraft fuselage when the aircraft is in rigging position.… …   Aviation dictionary

  • angle of incidence — noun 1. the angle that a line, ray of light, etc., meeting a surface, makes with the perpendicular to that surface at the point of meeting. 2. Aeronautics the angle between the chord line of an aerofoil and the longitudinal axis of the fuselage.… …   Australian English dictionary

  • angle of incidence — noun the angle that a line makes with a line perpendicular to the surface at the point of incidence • Syn: ↑incidence angle • Hypernyms: ↑angle • Hyponyms: ↑angle of attack, ↑critical angle …   Useful english dictionary

  • angle of incidence —    The angle of incidence as used here conforms to that used in optics to describe reflection and refraction of light rays. The angle is measured with respect to the normal to the surface, rather than to the surface itself. The normal is an… …   Forensic science glossary

  • angle of incidence — n the angle that a line (as a ray of light) falling on a surface or interface makes with the normal drawn at the point of incidence * * * the angle made with the perpendicular by a ray of light which strikes a denser or a rarer medium; see… …   Medical dictionary

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