< Page:Light waves and their uses.djvu
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Interference Methods in Spectroscopy
71
two components of each line. The conclusion which can be drawn from observation of such a curve as this is that the
FIG. 58 source which was used in obtaining it was a double line, each of whose components was double.
Curve 4 represents the visibility curve of two lines, one of which is very much brighter than the other, but whose
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