I realize this is a very basic question, but I've been thinking about this for a bit and can't seem to find an answer:(adsbygoogle = window.adsbygoogle || []).push({});

When I did the electron diffraction experiment on graphite, I saw 2 rings on the fluorescent screen. The description of these rings should be given to me by Bragg Law, namely ##2dsin(\frac{\theta}{2})=n\lambda##. I'm inclined to take ##n=1## for the first ring and ##n=2## for the second ring to the analogy of classical optics experiments but then I realize I'm not sure what I'm doing.

I don't know how the planes are oriented in the graphite plate, it could be possible that this second ring is just diffraction happening of a different set of planes and such that ##n=1## for the second ring as well. The other things I'm doubting about is that if I'd received only one ring, how could I tell which ##n## this ring corresponds to.

As you can see from this post I'm pretty confused. I need to understand this for the experiment but I don't really have the time right now to start learning the deep theory behind this phenomenon. I looked around online and all the descriptions are either to shallow or either to complicated. So I'd be very grateful if someone can read this and try to elaborate a little about these ##n##. Again I know the basic derivation of Bragg Law, but I have trouble with fully connecting this law to the rings I see.

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# Electron diffraction experiment

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