Physics
Scientific paper
Oct 1935
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1935natur.136..549k&link_type=abstract
Nature, Volume 136, Issue 3440, pp. 549-550 (1935).
Physics
1
Scientific paper
ONE of the most striking characteristics of both auroral and night-sky spectra is the absence of hydrogen lines. So far as I am aware, not even a trace of the atomic or molecular spectra of hydrogen has ever been observed in either of the above spectra. The question is immediately raised, does this absence prove that there is no hydrogen in the upper atmosphere at the heights at which night-sky and auroral spectra have been photographed? It is the purpose of this note to discuss briefly the answer to this question.
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