He II Balmer alpha concept from the Astronomy knowledge base

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He II Balmer alpha

subject fact

He II Balmer alpha has wavelength 1640 Å has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:22.0
is an instance of ionized helium Balmer line

spectral series line has series limit 2001-09-27 09:33:20.0
has lower energy level

ionized helium line has species ionized helium (He II)

spectral line has transition
has equivalent width

spectral feature has width 2001-09-27 09:33:18.0
occurs in

radiation measurement has unit radiation unit 2001-09-27 09:33:16.0

number has value 2001-09-27 09:32:57.0

He II Balmer alpha	has wavelength 1640 Å
He II Balmer alpha	is an instance of ionized helium Balmer line
spectral series line	has series limit
spectral series line	has lower energy level
ionized helium line	has species ionized helium (He II)
spectral line	has transition
spectral line	has equivalent width
spectral feature	has width
spectral feature	occurs in
radiation measurement	has unit radiation unit
number	has value