Abstract
DR. A. H. COMPTON'S letter to NATURE of November 17, p. 366, on the softening of secondary X-rays directs further attention to a problem of very great importance. There is distinct evidence with these rays of a change of periodicity which varies with the angle of scattering. Such a variation is, perhaps, unique in physics, and no satisfactory explanation of the facts has been found. Let us consider the history of the case.
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GRAY, J. The Softening of Secondary X-Rays. Nature 108, 435 (1921). https://doi.org/10.1038/108435a0
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DOI: https://doi.org/10.1038/108435a0
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