efront by half a wavelength or more. Thereforethere would he no general agreement in phase of the secondarywavelets along any line which could act as a reflected wave-fronl : on the contrary the secondary wavelets would have ageneral tendency to annul one anothers effects, leaving onlya weak… … Figure 133 flection even for exceedingly short waves, namely, when theatoms are arranged in regular plane layers, as in a crystal.Tliis idea occurred to Professor Laue, of Zurich, and at hissuggestion Priedrich and Knipping tried the effect of severaldifferent crystals in the path of a beam of…
Light
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