定律

This is a special case of Snell's law.

反射定律：在均匀介质中，同一波的反射角等于入射角。

In addition, Snell's law is applied, and traveltimes of waves from neighboring nodes are considered at the same time to determine the effective propagation area of the current secondary source.

在子波传播的计算上，利用斯奈尔定律，同时参考来自邻近节点的波的走时，来限定当前子波传播的有效区域，排除大量不需要计算的子波传播方向。

Usually called Snell's law.

通常也称为斯奈尔定律。

Snell's law reveals the propagation and refraction properties of the light when it passes through the interface composed by two media with different optical constants.

Snell定律揭示了光在穿越不同介质界面时的传播和折射规律，这是现代物理光学的重要基础。

In addition, Snell's law is applied, and traveltimes of waves from neighboring nodes are considered at the same time to determine the effective propagation area of the current secondary source. Thus, many unnecessary propagation directions are excluded.

在子波传播的计算上，利用斯奈尔定律，同时参考来自邻近节点的波的走时，来限定当前子波传播的有效区域，排除大量不需要计算的子波传播方向。

Snell's law follows from Fermat's principle.

斯奈尔定律遵从费马原理。

That is, movement adds only a fraction of the medium's velocity to the light (predicted by Fresnel in order to make Snell's law work in all frames of reference, consistent with stellar aberration).

即运动增添仅为介质的速度轻(预言菲涅尔为了使斯涅耳定律在各项工作的参照系，符合恒星像差)。

With the expression for the light propagation, the corresponding Snell's law and the expression of Fresnel coefficients are obtained, which can be applied to describe the re°ection-refraction event at the interface between an arbitrary combination of transparent and absorbing media.

并由此得到吸收介质界面上的反射和折射定律及其菲涅耳公式，所得结果也适用于由吸收和非吸收介质任意组合的界面。标签菲涅耳公式反射折射吸收折射率

Ray tracing: Determining the arrival time at detector locations by following raypaths which obey Snell's law through a model for which the velocity distribution is known.

射线追踪：通过追踪服从斯奈尔定律的射线穿过速度分布已知的模型，进而来测定其到达检波器位置所需的时间。

The sound pressure fields at M=0, M=0.1 and M=0.2 are also given out. It is found that the constant pressure contours at the distances not too far from the duct end are caved-in backward due to the effect of flow. And it can be explained using Snell's law.

同时还给出了M=0、M=0.1和M=0.2管口辐射声场的声压分布，发现流动使离管口稍远处声压等值线向管口方向凹陷，并用Snell定律作了解释。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。