# angle of incidence

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## angle of incidence

[′aŋ·gəl əv ′in·sə·dəns]
(optics)
The angle formed by a ray arriving at a surface and the perpendicular to that surface at the point of arrival. Also known as incidence angle.

## Angle of incidence

In terms of solar energy, the angle that the sun’s rays make with an imaginary line perpendicular to a surface. The angle of incidence determines the intensity of the energy that any surface experiences.

## angle of incidence

Angle of incidence is the angle between the fuselage reference line and the wing chord.
Incident rays on a surface. Two ways of measuring 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. Unlike the angle of attack, the angle of incidence is a fixed entity.
ii. The angle at which a ray of energy impinges upon a surface, usually measured between the direction of propagation of the energy and the perpendicular to the surface at the point of impingement, or incidence. In some cases involving radio waves, the angle of incidence is measured relative to the surface.
References in periodicals archive ?
The range of pressure varies from zero to the limit pressure (return flow) and by varying the incident angle from 0[degrees] to 15[degrees] with 5[degrees] increment.
As the illuminance source incident angle increases, the interference filter characteristics will change.
It is relatively easy to imagine that the absence of this provision would have translated into progressively smaller amounts of incoming light to enter the RTP as the incident angle increases.
This current investigation focuses not on the opening location, but on the effect of building opening size and wind incident angle on wind-driven ventilation using the PIV technique, a novel approach to study such problems.
It was seen that as long as there is positive low longitudinal permittivity, a critical angle exists in air such that Total Internal Reflection (TIR) occurs back into air for some range of incident angles.
For specific values and ranges of incident angles, total reflection of power has been observed hence structure can yield range of Brewster angles.
The unit cell is excited by an incident plane wave with different incident angles and polarizations.
As shown in the figure, the absorptive peaks remain greater than 80% with the incident angle ranging from 0[degrees] to 50[degrees] for TE mode.
When measuring the BRDF at different incident angles, the beam can pass through one of the 5 inlets on the sphere which allow for incident angles [sigma] = 0[degrees], 10[degrees], 20[degrees], 30[degrees], 45[degrees], and 60[degrees].
Compared with the default configuration shown in solid lines, the curves of the other cases with smaller plan areas exhibit different behaviors at different wind incident angles.
3 to transmit into a straight pipe of aspect ratio of 2, and another one of aspect ratio of 5 at different incident angles.
In our case, the incident angle is varied via the motion of the sample, and the total area of reflected light directions is covered by a number of fibers fixed in the space by a special way.

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