1.

The wavelength of X rays used in X ray crystallography is 8 x 10-10 m. It undergoes the first-order reflection at a glancing angle of 4.59 . What is the spacing between the atomic planes?

A. 4 x 10<sup>-9</sup> m
B. 15 x 10<sup>-9</sup> m
C. 10 x 10<sup>-9</sup> m
D. 5 x 10<sup>-9</sup> m
Answer» E.


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