# angle of incidence

(redirected from Normal incidence)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Normal incidence: Fresnel equations, Grazing incidence

## an·gle of in·ci·dence

1. the angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;
2. the angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.
Synonym(s): incident angle

## angle of incidence

the angle at which an ultrasound beam hits the interface between two different types of tissues, such as the facing surfaces of bone and muscle. The angle is also affected by the difference in acoustic impedance of the different tissues.

## an·gle of in·ci·dence

(anggĕl insi-dĕns)
1. Angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;
2. Angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.
Synonym(s): incident angle.

## angle of incidence

the angle at which a body, object or vector is moving relative to another (e.g. a stationary surface or environmental factor such as wind), often prior to a collision. Example: when playing a snooker ball at a cushion, the angle between the ball's direction of travel and the cushion.
References in periodicals archive ?
As can be seen from the presented examples for the metallic structure and near normal incidence the complete reflection is obtained for TM wave while TE wave is transmitted through the structure.
Refractive index sensing for nanodisks array under oblique incidence was compared with normal incidence.
The reflection and transmission coefficients for a plane wave with the E-field parallel to the y-axis at normal incidence are plotted as the function of frequency in Fig.
Therefore, it seems that the proposed system for new class of absorbers has a superior performance for s-polarization in terms angle of incidence dependence and for this polarization it can be used not only under normal incidence, but also under wide angles of incidence which we estimated to be around [+ or -]11 deg allowing a maximum frequency band shift of 0.
The values for normal force stiffness increase from normal incidence to attain maximum value in the range 45[degrees] < [[theta].
It can be seen that the measured central frequencies and band edges are nearly the same as those of the normal incidence case.
Let us start by calculating the reflection spectra, R, for an unfocused beam of light at normal incidence, [phi] = 0[degrees], and for [phi] = 15[degrees] and 30[degrees].
This bow-tie structure receives incoming electromagnetic waves at normal incidence and then dissipates these waves by the resistive load in the operating bandwidth, decreasing the scattered energy from the structure.
For normal incidence ([theta] = 0) the critical frequencies come from the zeroes of g = g([omega], 0).
Figure 2(a) shows the transmission spectra of the system with a quarter wave stacks as a function of the wavelength under normal incidence.
To this end, we used multibeam echosounder data to generate metrics that describe the seafloor: backscatter strength at normal and oblique incidence angles, the variation of the angle-dependent backscatter strength within 10[degrees] of normal incidence, the scintillation of the acoustic intensity scattered from the seafloor, and the seafloor rugosity.

Site: Follow: Share:
Open / Close