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1·All right. The other thing I have to teach you is matter-energy interaction so that we can see how the Balmer series validates the Bohr model.

好的，我要教你们的里一个知识点是，物质能量的相互作用，我们可以见证，巴尔末线系是怎样证实波尔模型的。

2·So anything that goes from a higher energy level to 2 is going to be falling within the Balmer series, which is in the visible range of the spectrum.

任何更高能级到2能级2，都是属于Balmer系，它在可见光谱中。