Physics:Quantum atoms/spectral line - Revision history

WikiHarold: Finish Quantum residual red link cleanup

2026-05-23T23:54:24Z

Finish Quantum residual red link cleanup

← Older revision		Revision as of 23:54, 23 May 2026
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			[[File:Quantum_atoms_spectral_line_concept_map.svg\|thumb\|280px\|spectral line in the Quantum Collection.]]
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WikiHarold: Remove imported red links from Quantum page

2026-05-23T23:46:46Z

Remove imported red links from Quantum page

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	~~[[File:Atomic_spectrum_lines.png\|thumb\|280px\|Spectral lines produced by electron transitions between discrete energy levels in an atom.]]~~
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WikiHarold: Expand short Quantum intro

2026-05-23T22:58:53Z

Expand short Quantum intro

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	A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an [[Physics:Quantum atoms/atom\|atom]]. It arises from a [[Physics:Quantum atoms/transition\|transition]] of an [[Physics:Quantum atoms/electron\|electron]] between different [[Physics:Quantum atoms/energy level\|energy levels]].		'''spectral line''' is a Book II topic in the Quantum Collection. A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an [[Physics:Quantum atoms/atom\|atom]]. It arises from a [[Physics:Quantum atoms/transition\|transition]] of an [[Physics:Quantum atoms/electron\|electron]] between different [[Physics:Quantum atoms/energy level\|energy levels]]. Spectral lines are among the clearest experimental signs of quantization. Their frequencies encode differences between allowed energy levels, while their intensities and selection rules reveal transition probabilities, angular momentum, and coupling to radiation. Spectral lines are used to identify atoms, measure fields, test quantum electrodynamics, and study distant stars and galaxies.
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Harold: Restore Quantum article header template

2026-05-17T21:51:41Z

Restore Quantum article header template

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	{{Short description\|Discrete frequency of light emitted or absorbed by an atom}}		{{Short description\|Discrete frequency of light emitted or absorbed by an atom}}

	~~[[Book:~~Quantum ~~Collection/Matter (by scale)~~\|~~← Back to Matter by scale]]~~		{{Quantum matter backlink\|Atoms}}

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	A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an [[Physics:Quantum atoms/atom\|atom]]. It arises from a [[Physics:Quantum atoms/transition\|transition]] of an [[Physics:Quantum atoms/electron\|electron]] between different [[Physics:Quantum atoms/energy level\|energy levels]].		A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an [[Physics:Quantum atoms/atom\|atom]]. It arises from a [[Physics:Quantum atoms/transition\|transition]] of an [[Physics:Quantum atoms/electron\|electron]] between different [[Physics:Quantum atoms/energy level\|energy levels]].
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			[[File:Atomic_spectrum_lines.png\|thumb\|280px\|Spectral lines produced by electron transitions between discrete energy levels in an atom.]]
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	~~[[File:Atomic_spectrum_lines.png\|300px]]~~
	~~<div style="font-size:90%;">Spectral lines produced by electron transitions between discrete energy levels in an atom.</div>~~
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imported>WikiHarold: Created page with "{{Short description|Discrete frequency of light emitted or absorbed by an atom}} ← Back to Matter by scale A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an atom. It arises from a transition of an electron between different energy levels...."

2026-04-27T18:12:50Z

Created page with "{{Short description|Discrete frequency of light emitted or absorbed by an atom}} ← Back to Matter by scale A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an atom. It arises from a transition of an electron between different energy levels...."

← Older revision	Revision as of 18:12, 27 April 2026
(No difference)

imported>WikiHarold: Created page with "{{Short description|Discrete frequency of light emitted or absorbed by an atom}} ← Back to Matter by scale A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an atom. It arises from a transition of an electron between different energy levels...."

2026-04-27T18:12:50Z

New page

{{Short description|Discrete frequency of light emitted or absorbed by an atom}}

[[Book:Quantum Collection/Matter (by scale)|← Back to Matter by scale]]

A '''spectral line''' is a discrete frequency or wavelength of light emitted or absorbed by an [[Physics:Quantum atoms/atom|atom]]. It arises from a [[Physics:Quantum atoms/transition|transition]] of an [[Physics:Quantum atoms/electron|electron]] between different [[Physics:Quantum atoms/energy level|energy levels]].

<div style="float:right; border:1px solid #e0d890; background:#fff8cc; padding:6px; margin:0 0 1em 1em; width:320px;">
[[File:Atomic_spectrum_lines.png|300px]]
<div style="font-size:90%;">Spectral lines produced by electron transitions between discrete energy levels in an atom.</div>
</div>

== Description ==
Each spectral line corresponds to a specific difference in energy between two energy levels. When an electron transitions to a lower level, a photon is emitted; when it moves to a higher level, a photon is absorbed.

The set of spectral lines forms an atomic spectrum, which is characteristic of each element.

== Properties ==

* discrete wavelengths or frequencies
* determined by [[Physics:Quantum atoms/energy level|energy level]] differences
* produced by [[Physics:Quantum atoms/transition|transitions]]

=See also=
{{#invoke:PhysicsQC|tocHeadingAndList|Physics:Quantum basics/See also}}

=References=
{{reflist|3}}

{{Author|Harold Foppele}}
{{Sourceattribution|Physics:Quantum atoms/spectral line|1}}