Okay, so last time we saw the jeopardy approach

上节课我们用倒推法
to solving the Schrodinger equation,

求解了薛定谔方程
which is to take the answer and find out what the problem was,

也就是用答案来找出我们的问题是什么
and we saw that for a constant potential you got a sine wave.

为了获得恒势能要使用一个正弦函数
You could choose any length of sine wave you wanted,

波的波长可以随便选
any wave period you wanted.

多大都可以
It just turned out to be different energies

不同的波长对应不同的能量