And instead of having the electron giving off energy as a photon, instead now the electron is going to take in energy from light and move up to that higher level.

与电子以光子形式施放能量不同,我们现在要从光中,获得能量到一个更高的能级。

麻省理工公开课 - 化学原理课程节选

And we can think about here we did get that energy for electron promotion that I mentioned before 2p where we moved the electron from the 2 s to the 2 p.

我们可以考虑,我们从哪里,获得了能量使电子,从2s激发到。

麻省理工公开课 - 化学原理课程节选