A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 296
t 129.] DIFFRACTION OF LIGHT. 265 latiou betwecQ the length of the waves of light andthe distance between the threads. The central image (a, Fig. 114) is the direct imageof the candle. It may be distinguished from theside images, a and a, for instance, botb by itsgreater distinctness and by the… … Fig. 115. The side images will be found tinged with blue onthe side toward a, and with red on the outer side.This is due to the fact that different colors are un-equally bent by diffraction. Each of the side imagesis in fact a spectrum of the candle. It is inter-esting to place two candles at…
Physics
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