by Ciro Santilli (@cirosantilli, 36)
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 (11)

  1. Hyperfine structure
  2. Fine structure
  3. Spectral line
  4. Emission spectrum
  5. Quantum mechanics experiment
  6. Quantum mechanics
  7. Particle physics
  8. Physics
  9. Natural science
  10. Science
  11. Home

Incoming links (2)

Synonyms (1)

View article source

Discussion (0)

+ New discussion

There are no discussions about this article yet.

Articles by others on the same topic (1)

Hydrogen line by Wikipedia Bot 0 1970-01-01
Read the full article
See all articles in the same topic + Create my own version