Bragg's Law
Constructive interference from parallel lattice planes spaced d apart occurs when nλ = 2d sinθ, so diffraction appears only at discrete angles. Shorter wavelengths and larger scattering angles probe smaller d-spacings, which is why high-angle reflections carry the high-resolution detail.
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Constructive interference from parallel lattice planes spaced d apart occurs when nλ = 2d sinθ, so diffraction appears only at discrete angles. Shorter wavelengths and larger scattering angles probe smaller d-spacings, which is why high-angle reflections carry the high-resolution detail.
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