X rays, an introduction to the study of Röntgen rays (1914)
Kaye, G. W. C. (George William Clarkson), 1880-1941 · London : Longmans, Green · leaf 200
mitwavelets which are in phase along OP. It is necessary toobtain the corresponding conditions for the centre-face atoms(such as D and E), so that their wavelets also shall be inphase with those from the corner atoms. The difference in phase between the wavelets from D and O will be ( — -)… … Fig. 86.—Represented ion of the diffrac-tion of X rays by the atoms at the cornersand face-centres of an elementary cubeof a cubic crystal. 178 X RAYS odd or both even. The same must also hold for h2 andh3. This at once explains why the complete series of valuesof h1} h2, and h3 for the Laue spots…
X-rays
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