...空气向海水传播时在海水的折射率，θ1 是入射角，θ2 是折射角，c 和 v分别是电磁波在空气和海水中传播的 相速度 （ phase speed ），这里v指复 相速度 的实部。使用测量折射的仪器可测得在可见光范围介质的折射率n′。
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并且很容易地得知,海浪高度,波长,周期, 相位速度 ( phase speed )是。 根据该理论,这些参数间互相有关连,在深水区域时,周期(T)和波长(L)的关系: .
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single-phase speed regulating motor 单相调速电机
three-phase speed change induction motor 三相变速感应电动机
phase-speed 相速度
moving-phase speed control 移相调速
single-phase two-speed motor 单相双速电动机
in-phase speed-sensitive output voltage 同相速敏输出电压
single-phase single-speed motor 单相单速电动机
N the speed at which the phase of a wave is propagated, the product of the frequency times the wavelength. This is the quantity that is determined by methods using interference. In a dispersive medium it differs from the group speed 相速度 (Also called wave speed, wave velocity) [physics]
The air-sea interaction has certain effect on slowing down the phase speed of the wave.
海-气相互作用在减慢激发波的移速方面也有一定作用。
However, phase speed depends on plasma frequency and structure dimension, and very slow waves can exist in very small sized waveguide.
然而，波的相速依赖于等离子体频率和结构尺寸，并且非常慢的波可以存在于非常小尺寸的波导中。
The well-known phase speed formulas of surface inertial gravity wave and internal shear inertial gravity wave are the special cases of this frequency equation.
表面惯性重力波和惯性重力内波的相速公式都是这个更普遍的频率方程的特殊情况。
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