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Origin of Laue equations?
The Bragg condition (by Bragg in 1913) can be derived by the Laue equations that is making use of the Miller indices and all the latice/crystal stuff (so basically it's bringing Bragg's law to more ...
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Bragg condition for transmission: Why is the full diffracted angle Two times Theta? Or isn't it?
On a Bragg reflection with incomming angle Theta the total diffraction angle of the incomming wave is 2*Theta, of course.
But I have Bragg transmission with electrons on a graphite crystal ...
