Question: X rays from a copper X-ray tube (l = 1.54 ) were diffracted at an angle of 14.228 by a crystal of silicon. Assuming first-order

X rays from a copper X-ray tube (l = 1.54 Å) were diffracted at an angle of 14.228 by a crystal of silicon. Assuming first-order diffraction (n = 1 in the Bragg equation), what is the interplanar spacing in silicon?

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