If you have benzene, for example, the lowest electronic state, is quite far below the first excited state.

比如苯环，也就是最低电子态，远低于第一激发态。

youdao

The degenerate energy levels of the first excited state are not relieved. The degenerate energy levels of the second excited state are relieved partially.

第一激发态的简并没有消除，第二激发态的简并被部分地消除。

youdao

It suggests that intermolecular electron transfer occurs during the transition of the first excited state, which results in the fluorescence quenching effect.

因此，发生第一激发态跃迁时，将发生分子间电子转移，从而引起荧光猝灭效应。

youdao

So another way to say that is, in a sense, if we're thinking about the excited state of a hydrogen atom, the first excited state, or the n equals 2 state, what we're saying is that it's actually bigger than the ground state, or the 1 s state of a hydrogen atom.

换句话说，如果我们激发一个氢原子，第一激发态或者说ｎ等于２的态，我们说它比氢原子基态,或者说１ｓ态要大。

麻省理工公开课 - 化学原理课程节选

So, for example, we could talk about the n equals 2 state, so that's this state here, and it's also what we could call the first excited state. So we have the ground state, and if we excite an electron into the next closest state, we're at the first excited state, or the n equals 2 state.

例如，我们可以考虑n等于2的状态，它在这里，它也被称作是第一激发态,我们有基态，如果我们把一个电子,激发到它最近邻的态,那就是第一激发态，或者n等于2的态。

麻省理工公开课 - 化学原理课程节选

So, the third excited state, is n equal to 4, because n equals 2 is first excited, 3 is second excited, 4 is third excited state.

因为n等于2是第一激发态,等于3是第二激发态。

麻省理工公开课 - 化学原理课程节选