Ciro Santilli
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Hydrogen line (21 centimeter line)
Hyperfine structure
tags:
Hydrogen emission spectrum
nosplit
words:
25
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
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Caesium standard
Hyperfine structure