So really what we'll probably do is instead either give you the wavelength or the frequency and you'll go ahead and calculate the energy from there.

所以实际上我们可能的做法是,给你波长或者频率,然后你可以通过他们计算得到能量。

麻省理工公开课 - 化学原理课程节选

Already from this class if I told you that I gave you energies in some spectrum but they were off by a factor of four, what would you think? Maybe the Z is wrong.

从这节课开始,如果我告诉你我给了你,在某些光谱里的能量,但它们不属于四大元素之一，你会怎么想？也许Z是错的。

麻省理工公开课 - 固态化学导论课程节选