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Spectral line

Index Physics Concepts in physics Concepts in astronomy Spectroscopy
 1 By others on same topic  0 Discussions  1970-01-01  See my version

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  1. Spectroscopy
  2. Concepts in astronomy
  3. Concepts in physics
  4. Physics
  5. Index

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 Articles by others on the same topic (1)

Spectral line by Ciro Santilli 37  Updated 2025-05-29  +Created 1970-01-01
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A single line in the emission spectrum.
So precise, so discrete, which makes no sense in classical mechanics!
Has been the leading motivation of the development of quantum mechanics, all the way from the:
  • Schrödinger equation: major lines predicted, including Zeeman effect, but not finer line splits like fine structure
  • Dirac equation: explains fine structure 2p spin split due to electron spin/orbit interactions, but not Lamb shift
  • quantum electrodynamics: explains Lamb shift
  • hyperfine structure: due to electron/nucleus spin interactions, offers a window into nuclear spin
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