Question: In an x-ray diffraction experiment on a crystal that has a cubic lattice, the smallest Bragg angle at which you see a peak in the

In an x-ray diffraction experiment on a crystal that has a cubic lattice, the smallest Bragg angle at which you see a peak in the intensity of diffraction pattern is $15.00^{\circ}$. If the $x$-ray are produced from a copper source $(0.154 \mathrm{~nm})$, what is the atomic spacing in the crystal? Assume that only first-order interference fringes are visible in the diffraction pattern of this crystal.

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