Can you see what he's holding in his hand?

你看到他手中拿着什么吗
A candle.

蜡烛
I'll give you a hint. It's a prism.

我给你一个提示这是一个棱镜
Why is he holding a prism?

为什么他拿着棱镜
Because that was his crucial experiment;

因为这是他的关键实验
and here's his diagram in that experiment with a prism in it.

这是他在实验中使用棱镜的图
He called it the Experimentum Crucis, taking the word from Bacon.

他称之为决断实验引用了培根的词汇
Okay, so light came in through a hole in the window, through a lens,

光线从窗口的洞射入穿透镜片
and then got bent and dispersed into the different colors.

然后被弯曲并分散成不同的颜色
So you get a spectrum here on this thing,

通过棱镜你得到了光谱
the different colors.

就是这些不同的颜色
Now there's the question, how does the prism make color?

现在问题来了棱镜如何造就这些颜色