The presence of groups of closely spaced spectrum lines observed in the atomic spectrum of certain elements.
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"Fine structure" Quotes from Famous Books ![]() ![]() — Rambles and Recollections of an Indian Official • William Sleeman ![]() ![]() — By Water to the Columbian Exposition • Johanna S. Wisthaler ![]() ![]() — Pushbutton War • Joseph P. Martino |
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