The Lyman‐alpha line has been detected for the first time in the solar spectrum according to a report in the July 15, 1953, issue of The Physical Review. A grating spectrograph was mounted in an Aerobee rocket, which then was flown to 81 km for the exposure. This was the only line observed in the far ultra‐violet, and its total intensity outside the earth's atmosphere was estimated to be 0.05 microwatt/cm2.

Topics
Atmospheric physics, Spectral methods, Hydrogen spectra, Journal
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© 1953 American Institute of Physics.
1953
American Institute of Physics
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