Consider the Bragg equation, with respect to first?order reflections, from {100} planes of a bcc metal. By how much of a wavelength do the reflected path?lengths differ for two adjacent parallel (100) planes, if the interplanar spacing, d, is taken as a instead of a/2? Does this explain why the {100} plane is not listed as a reflecting plane in Appendix C? Explain.
What will be an ideal response?
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