I was looking up X-Ray crystallography using Bragg's Law:
$2d\sin\theta = n\lambda$
and I can understand the values of everything except this integer value $n$.
As far as my research got $n$ is used to describe the atom spacing in the crystal lattice, but I don't understand how you'd express $n$ or how it would describe it.
Could someone please explain this to me please?
Note: diagrams tend to be very useful in developing my understanding and if anyone has any reference to a video that might help as well. Thanks.