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by
Ciro Santilli
(@cirosantilli,
25
)
Hydrogen line (21 centimeter line)
tags:
Hydrogen emission spectrum
21 cm is very long and very low energy, because he energy split is very small!
Compare it e.g. with the
hydrogen 1-2 spectral line
which is 121.6 nm!
Ancestors
Hyperfine structure
Fine structure
Spectral line
Emission spectrum
Quantum mechanics experiment
Quantum mechanics
Particle physics
Physics
Natural science
Science
Index
Incoming links
Caesium standard
Hyperfine structure
Synonyms
cirosantilli/21-centimeter-line
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