Can you see?

你们能想到吗
Sam?

山姆
Ah, there'll only be really precise angles, at which they all interfere;

形成衍射的散射角度必须非常精确
otherwise the 180th will interfere with the first,

不然第180束散射可能会将第1束抵消
the 181st with the second and so on.

第182束又会将第2束抵消
So if we add the whole phase, the whole thing,

所以如果我们将所有的原子都加上去
then if we look at the pattern it's going to be brighter,

形成的衍射图像会更亮
But it'll be only dots,

但图像却全是点状的
only at very precise angles. Right?

从很精确的角度发出的散射才能形成衍射
And that's what we saw

这也就是我们最初看到的
when we went to this final picture for scattering from a lattice.

晶格的散射形成的图像
So what this means is that the lattice repeat

这就意味着重复排列的晶格