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Hydrogen-alpha

Hydrogen-alpha, typically shortened to H-alpha or Hα, is a deep-red visible spectral line of the hydrogen atom with a wavelength of 656.28 nm in air and 656.46 nm in vacuum. It is the first spectral line in the Balmer series and is emitted when an electron falls from a hydrogen atom's third- to second-lowest energy level. H-alpha has applications in…

Balmer series, Filter & Overview

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Balmer series

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Hydrogen-alpha

Nodes42
Edges41
Triples5
Avg. degree1.95
Density0.047619
Components1

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h-alpha hydrogen atom line filter energy series nm light electron spectral wavelength balmer narrow filters dichroic etalon typically visible air

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SubjectPredicateObjectConfidenceSrc
carbon dioxideinstance ofmolecules0.80text
carbon monoxideinstance ofmolecules0.80text
formaldehydeinstance ofmolecules0.80text
ammoniainstance ofmolecules0.80text
or acetonitrile are typically used to determine the mass of a cloudinstance ofmolecules0.80text

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