p37_053 - 53 Bragg’s law gives the condition for a...

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Unformatted text preview: 53. Bragg’s law gives the condition for a diffraction maximum: 2d sin θ = mλ where d is the spacing of the crystal planes and λ is the wavelength. The angle θ is measured from the surfaces of the planes. For a second-order reflection m = 2, so d= mλ 2(0.12 × 10−9 m) = 2.56 × 10−10 m = 256 pm . = 2 sin θ 2 sin 28◦ ...
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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