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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > U line
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U line
subjectfact 
U linehas wavelength 3302 Åhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:22.0
is a kind of spectral line2001-09-27 09:33:22.0
has species sodium (Na I)has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:22.0
spectral linehas transition2001-09-27 09:33:20.0
has equivalent width2001-09-27 09:33:20.0
spectral featurehas width2001-09-27 09:33:18.0
occurs in2001-09-27 09:33:18.0
radiation measurementhas unit radiation unit2001-09-27 09:33:16.0
numberhas value2001-09-27 09:32:57.0