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 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:

  • 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 — (A[ e]ronautics) The angle between the chord of an a[ e]rocurve and the relative direction of the undisturbed air current. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • 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

  • 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 —    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 —   In reference to solar energy systems, the angle at which direct sunlight strikes a surface; the angle between the direction of the sun and the perpindicular to the surface. Sunlight with an incident angle of 90 degrees tends to be absorbed,… …   Energy terms

  • angle of incidence —    When light (incident light that from a source of light) strikes an object s surface it forms an angle with an imaginary line known as the normal, which is perpendicular to the surface. The angle created between the incident ray and the normal… …   Glossary of Art Terms

  • angle of incidence — 1. Also called incidence. Optics, Physics. the angle that a straight line, ray of light, etc., meeting a surface, makes with a normal to the surface at the point of meeting. 2. (on an airplane) the angle, usually fixed, between a wing or tail… …   Universalium

  • angle of incidence — Date: 1626 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 …   New Collegiate Dictionary

  • angle of incidence — noun a) The angle that a straight line, ray of light, etc., meeting a surface, makes with a normal to the surface at the point of meeting. b) The angle, usually fixed, between the chord line of a wing or horizontal stabilizer and the …   Wiktionary

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