Physics:Quantum black-body radiation - Revision history

Maintenance script: Add Foundations previous-next navigation

2026-05-20T12:15:05Z

Add Foundations previous-next navigation

← Older revision		Revision as of 12:15, 20 May 2026
Line 1:		Line 1:
	{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}		{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}
	{{Quantum book backlink\|Foundations}}		{{Quantum book backlink\|Foundations}}
			{{Quantum article nav\|previous=Physics:Quantum photoelectric effect\|previous label=Photoelectric effect\|next=Physics:Quantum Planck constant\|next label=Planck constant}}

	<div style="display:flex; gap:24px; align-items:flex-start; max-width:1200px;">		<div style="display:flex; gap:24px; align-items:flex-start; max-width:1200px;">

Maintenance script: Improve Book I intro quality

2026-05-20T09:02:16Z

Improve Book I intro quality

← Older revision		Revision as of 09:02, 20 May 2026
Line 1:		Line 1:
	{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}		{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}
	{{Quantum book backlink\|Foundations}}		{{Quantum book backlink\|Foundations}}

Line 9:		Line 9:

	<div style="flex:1; line-height:1.45; color:#006b45; column-count:2; column-gap:32px; column-rule:1px solid #b8d8c8;">		<div style="flex:1; line-height:1.45; color:#006b45; column-count:2; column-gap:32px; column-rule:1px solid #b8d8c8;">
	'''black-body radiation''' ~~is a Book I topic in the Quantum Collection. Black~~-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory. Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory.		'''black-body radiation''' black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory. Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory. Classical descriptions of thermal radiation failed at high frequencies because they predicted too much emitted energy.
	</div>		</div>

Maintenance script: Clean Book I red links, intro, and image slots

2026-05-20T08:10:59Z

Clean Book I red links, intro, and image slots

← Older revision		Revision as of 08:10, 20 May 2026
Line 1:		Line 1:
	{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}		{{Short description\|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}
	{{Quantum book backlink\|Foundations}}		{{Quantum book backlink\|Foundations}}

Line 9:		Line 9:

	<div style="flex:1; line-height:1.45; color:#006b45; column-count:2; column-gap:32px; column-rule:1px solid #b8d8c8;">		<div style="flex:1; line-height:1.45; color:#006b45; column-count:2; column-gap:32px; column-rule:1px solid #b8d8c8;">
	Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory.		'''black-body radiation''' is a Book I topic in the Quantum Collection. Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory. Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory.
	</div>		</div>

Maintenance script: Apply full top template to Quantum black-body radiation

2026-05-18T23:32:50Z

Apply full top template to Quantum black-body radiation

@@ Line 2: / Line 2: @@
 {{Quantum book backlink|Foundations}}
 Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory.
 == Classical problem ==

Maintenance script: Create Quantum Collection page: black-body radiation

2026-05-18T21:52:58Z

Create Quantum Collection page: black-body radiation

New page

{{Short description|Quantum treatment of black-body radiation and Planck's resolution of the ultraviolet catastrophe}}
{{Quantum book backlink|Foundations}}

Black-body radiation is the electromagnetic radiation emitted by an idealized object that absorbs and emits radiation perfectly. Classical physics predicted an ultraviolet catastrophe, with unlimited energy at high frequencies, but this contradicted experiment. Planck resolved the problem by assuming that radiation energy is exchanged in discrete units, introducing the quantum idea that helped launch modern quantum theory.

== Classical problem ==
Classical descriptions of thermal radiation failed at high frequencies because they predicted too much emitted energy. This mismatch between theory and experiment became one of the key problems that led to [[Physics:Quantum mechanics|quantum mechanics]].

== Planck quantization ==
Planck's solution assumed that matter and radiation exchange energy in discrete amounts. This idea is an early form of [[Physics:Quantum methods/quantization|quantization]] and connects black-body radiation to the origin of the quantum concept.

== Energy-frequency relation ==
The energy carried by each quantum is proportional to frequency, with the proportionality set by the [[Physics:Quantum Planck constant|Planck constant]]. This relation is also central to [[Physics:Quantum photon|photons]] and [[Physics:Quantum electromagnetic field|electromagnetic radiation]].

== Ultraviolet catastrophe ==
The ultraviolet catastrophe names the classical prediction that the emitted energy should grow without bound at short wavelengths. Quantum energy packets remove this divergence and produce the observed spectrum.

== Role in quantum theory ==
Black-body radiation is one of the historical foundations of quantum theory. It links thermal physics, radiation, and the discrete structure of energy exchange.

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

== References ==
{{reflist|3}}

{{Author|Harold Foppele}}

{{Sourceattribution|Physics:Quantum black-body radiation|1}}