# angle of incidence

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Related to Normal incidence: Fresnel equations, Grazing incidence

## 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 ?
z] = 50 mm is analyzed for normal incidence of the wave inclined by [alpha] = 45[degrees] with respect to the cylinder axis.
We consider an incident plane wave of normal incidence from the vacuum side, whose electric field is polarized in [x.
By changing the refractive index, it can be seen that for normal incidence the extinction cross section changes gradually, but for oblique incidence at [theta] =22[degrees] the extinction cross section is larger for n =1.
Supposed FSS is under the normal incidence of plane wave with the E-field parallel to the x-axis ([TEM.
In order to realize how the proposed structure works, consider initially the 1D-dispersion diagram of the artificial medium (z-direction) under the assumption that we take just normal or close to normal incidence.
The couplant corresponding to the ultrasonic longitudinal wave is one kind of normal lubricating oil, but the couplant corresponding to the transverse wave must be the special viscous media because of the normal incidence transverse transducer's characteristic.
The EUNIS mission, short for Extreme Ultraviolet Normal Incidence Spectrograph, launched on April 23, 2013, gathering a new snapshot of data every 1.
The new observations came from just six minutes worth of data from one of NASA's least expensive type of missions, a sounding rocket, EUNIS (Extreme Ultraviolet Normal Incidence Spectrograph) mission, launched on April 23, 2013, which gathers a new snapshot of data every 1.
z] for normal incidence on the sample for a specific orientation of electric field with respect to fiber warp and fill directions.
4])] for all the stiffnesses start with maximum value at normal incidence and then decrease to attain minimum value at grazing incidence.
These mirrors are Silicon substrates (reflectivity 35 %) with B4C coating (reflectivity 25-30 %), and the measurements will be carried out in normal incidence and grazing incidence.
The transmission coefficient for normal incidence is also shown for comparison.

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