Q
X-rays are diffracted by a crystal but not by a diffraction grating because_____________?
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A
A. The ions in a crystal are well arranged
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B
B. The lines in a diffraction grating cannot reflect x-rays.
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C
C. The penetration power of x-rays is high in a diffraction grating
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D
D. The wavelengths of x-rays are of the same order of magnitude as the separation between atoms in a crystal
Correct Answer:
D. D. The wavelengths of x-rays are of the same order of magnitude as the separation between atoms in a crystal
