Current in resistors is in phase with voltage.

电阻器中的电流与电压同相。

Since the voltage and current peaks occur at the same time, the two are said to be in phase.

由于电压峰值和电流峰值 同时出现，因此称两者同相。

Before, we were feeding the same signal to the two antennas and thus the antennas were in phase with one another.

之前，我们将相同的信号馈送两个天线，因此这两个天线彼此同相。

By seeing how in or out of phase two light waves  are, an observer can infer the relative speed of the waves.

通观察两个波的同相或异相，观察者可以推断出波的相对速度。

If undisturbed, the  beams will be in phase, meaning their frequencies will subtract each other, and no light will arrive  at the photodiode.

如果不受干扰，束将同相，这意味着它们的频率将相互减去，并且没有电二极管。

If the waves are exactly in phase, rising and falling perfectly in sync, they will interfere constructively, merging to create a wave with double the intensity.

如果这些波完全同相， 即完全同步地升起和落下，它们将发生建设性干涉，合并一个强度加倍的波。

The key, when you have light just of one frequency like this, is to understand where the waves are in and out of phase with each other.

当你有单一频率的时，关键是要理解这些波何时同相或反相。

The gravity waves moving through the inversion  created enough lift that a strong updraft was formed and it moved in phase with the peak of the  gravity wave.

通反转的重力波产生了足够的升力，形了强大的上升气流，并且与重力波的峰值同相移动。

So the key question, if you want to understand whether those two waves are in or out of phase with each other, is how big is that snippet?

所以关键的问题是， 如果你想判断这两列波是否同相或反相，那就是这个片段有多大？

In that case, the waves coming from each one would be in phase with each other, so they interfere constructively, and that's why you get a bright spot.

在这种情况下， 来自每个点的波会相互同相，因此它们会产生建设性干涉， 这就是你看亮斑的原因。