The longest wavelength that can be analysed by a NaCl crystal of inter – McqOptions

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1.	The longest wavelength that can be analysed by a NaCl crystal of interplanar spacing 0.281 nm between its principal planes, in the first order, is:
A.	0.654 nm
B.	0.564 nm
C.	0.969 nm
D.	0.282 nm
Answer» C. 0.969 nm

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