X-Ray Diffraction: The lattice spacing of the principal Bragg planes in sodium chloride is 0.282 nm. For what wavelength of x-rays will the first order reflected beam diffract at 55° with respect to the normal to the crystal planes?
A. 0.323 nm
B. 0.530 nm
C. 0.662 nm
D. 0.150 nm
E. 0.462 nm
Answer: A
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