有规律的重复活动如声波、光波、无线电波都有一个特定的频率，或者说是每秒的波动次数。

Regular repeating actions such as sound waves, light waves, or radio waves have a certain frequency, or number of waves per second.

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在光学天文学中，在用望远镜观察恒星时，我们依靠的是可见光波。

In optical astronomy, using a telescope and observing the stars that way, we rely on visible light waves.

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与可见光波不同的是，这些无线电波可以较容易地穿过太空中的各种气体和灰尘，穿过我们地球的大气层。

Unlike visible light waves, these radio waves can get through the various gases and dusts in space, and through our own earth's atmosphere comparatively easily.

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Just like we see destructive interference with water waves or with light waves, we can also see destructive interference with orbitals.

就像我们看到水波,和光波的相消干涉，我们也可以看到轨道的相消干涉。

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So, it's important to get a little bit of a sense of what all these different kinds of lights do.

对所有这些不同种类的光波,有个大致的了解是非常重要的。

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We have waves of light.

我们有光波。

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