very small but it's not zero; that's not a node.

非常小的值但不是零它不是节点
A node is where it's zero because it's changing sign.

节点是它为零的地方因为符号改变了
Okay, now nodes are related to energy. Why?

节点与能量有关为什么
Notice that the lowest energy one, blue, had no node,

注意能量最低的这条蓝线没有节点
the next one, the purple, had one node.

旁边的紫色这条有一个节点
The next one, the violet or whatever color it is,

再下一个紫罗兰色或不管它是什么颜色
had two nodes. Why is there that relationship?

有两个节点为什么会出现这种关系
I was noticing inflection points.

我注意到有拐点
Professor Michael McBride: They are inflection points,

教授-这些是拐点
but why do they get higher in energy when you have more nodes?Sam?

但是为什么节点多的能量就高萨姆
Higher frequency.

频率高
Say it in terms of energy.

用能量来叙述