Physics:Quantum Planck scale - Revision history

Maintenance script: Apply continuous Quantum previous-next navigation

2026-05-20T22:06:53Z

Apply continuous Quantum previous-next navigation

← Older revision		Revision as of 22:06, 20 May 2026
Line 1:		Line 1:
	{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}		{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}

Maintenance script: Apply continuous Quantum previous-next navigation

2026-05-20T22:03:00Z

Apply continuous Quantum previous-next navigation

← Older revision		Revision as of 22:03, 20 May 2026
Line 1:		Line 1:
	{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}		{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}


	{{Short description\|Scale where quantum effects of gravity are expected to become important}}		{{Short description\|Scale where quantum effects of gravity are expected to become important}}

Maintenance script: Apply continuous Quantum previous-next navigation

2026-05-20T12:39:05Z

Apply continuous Quantum previous-next navigation

← Older revision		Revision as of 12:39, 20 May 2026
Line 1:		Line 1:
	{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}		{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}

	{{Short description\|Scale where quantum effects of gravity are expected to become important}}		{{Short description\|Scale where quantum effects of gravity are expected to become important}}

Maintenance script: Apply Quantum previous-next navigation

2026-05-20T12:30:09Z

Apply Quantum previous-next navigation

← Older revision		Revision as of 12:30, 20 May 2026
Line 1:		Line 1:
			{{Quantum article nav\|previous=Physics:Quantum false vacuum\|previous label=False vacuum\|next=Physics:Quantum spacetime foam\|next label=Spacetime foam}}
	{{Short description\|Scale where quantum effects of gravity are expected to become important}}		{{Short description\|Scale where quantum effects of gravity are expected to become important}}

Maintenance script: Repair Book II intro, links, and image slot

2026-05-20T07:26:48Z

Repair Book II intro, links, and image slot

← Older revision		Revision as of 07:26, 20 May 2026
Line 1:		Line 1:
	{{Short description\|Scale where quantum effects of gravity are expected to become important}}		{{Short description\|Scale where quantum effects of gravity are expected to become important}}

	{{Quantum matter backlink\|Vacuum and spacetime}}		{{Quantum matter backlink\|Vacuum and spacetime}}
Line 10:		Line 10:

	<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;">
	~~The~~ '''~~quantum~~ Planck scale''' is the regime of length, time, energy, and mass built from the constants ~~<math>~~c~~</math>~~, ~~<math>~~G~~</math>~~, and ~~<math>~~\hbar~~</math>~~. It is often used as an estimate of where both quantum theory and gravity must be treated together. At this scale, classical spacetime geometry is expected to lose its ordinary smooth description.~~<ref>{{cite web \|title=~~Planck ~~units \|url=https://en~~.~~wikipedia~~.org/wiki/Planck_units \|website=Wikipedia \|access-date=19 May 2026}}</ref><ref>{{cite book \|last=Rovelli \|first=Carlo \|title=Quantum Gravity \|publisher=Cambridge University Press \|year=2004 \|id=ISBN 978-0-521-83733-0}}</ref>		'''Planck scale''' is a Book II topic in the Quantum Collection. The quantum Planck scale is the regime of length, time, energy, and mass built from the constants c, G, and \hbar. It is often used as an estimate of where both quantum theory and gravity must be treated together. At this scale, classical spacetime geometry is expected to lose its ordinary smooth description. The quantum Planck scale is the regime of length, time, energy, and mass built from the constants c, G, and \hbar. It is often used as an estimate of where both quantum theory and gravity must be treated together. At this scale, classical spacetime geometry is expected to lose its ordinary smooth description.
	</div>		</div>

Maintenance script: Normalize Quantum book page structure and short text

2026-05-19T23:08:06Z

Normalize Quantum book page structure and short text

← Older revision		Revision as of 23:08, 19 May 2026
Line 27:		Line 27:
	== Physics role ==		== Physics role ==
	The Planck scale provides a reference point for black-hole thermodynamics, early-universe cosmology, quantum gravity, and searches for possible departures from standard field theory.		The Planck scale provides a reference point for black-hole thermodynamics, early-universe cosmology, quantum gravity, and searches for possible departures from standard field theory.

			== Description ==
			'''Planck scale''' is a matter-scale concept used to organize how quantum theory describes atoms, particles, fields, condensed matter, plasma, or spacetime-related systems. In the Quantum Collection it is placed by scale so the reader can move from materials and molecules down to subatomic degrees of freedom.

			== Quantum context ==
			At this scale, the relevant behavior is controlled by quantized states, interactions, conservation laws, and the way excitations or particles are observed. The concept is normally linked to measurable properties such as energy, momentum, charge, spin, spectra, scattering rates, or collective modes.

			== Role in the collection ==
			This page provides a compact reference point for related pages in Book II. It should be read together with nearby matter-scale topics and the corresponding foundations in [[Physics:Quantum mechanics\|quantum mechanics]].<ref name="matter-wiki">{{cite web \|url=https://en.wikipedia.org/wiki/Quantum_mechanics \|title=Quantum mechanics \|website=Wikipedia \|access-date=2026-05-20}}</ref>

	=See also=		=See also=

Maintenance script: Create Vacuum and spacetime chapter page from reviewed Wikipedia sources

2026-05-19T21:53:46Z

Create Vacuum and spacetime chapter page from reviewed Wikipedia sources

New page

{{Short description|Scale where quantum effects of gravity are expected to become important}}

{{Quantum matter backlink|Vacuum and spacetime}}

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

<div style="width:280px;">
__TOC__
</div>

<div style="flex:1; line-height:1.45; color:#006b45; column-count:2; column-gap:32px; column-rule:1px solid #b8d8c8;">
The '''quantum Planck scale''' is the regime of length, time, energy, and mass built from the constants <math>c</math>, <math>G</math>, and <math>\hbar</math>. It is often used as an estimate of where both quantum theory and gravity must be treated together. At this scale, classical spacetime geometry is expected to lose its ordinary smooth description.<ref>{{cite web |title=Planck units |url=https://en.wikipedia.org/wiki/Planck_units |website=Wikipedia |access-date=19 May 2026}}</ref><ref>{{cite book |last=Rovelli |first=Carlo |title=Quantum Gravity |publisher=Cambridge University Press |year=2004 |id=ISBN 978-0-521-83733-0}}</ref>
</div>

<div style="width:300px;">
[[File:Quantum_Planck_scale_yellow.png|thumb|280px|Planck scale: a symbolic resolution limit where quantum gravity becomes important.]]
</div>

</div>

== Planck units ==
Planck length, Planck time, Planck mass, and Planck energy are natural units formed from fundamental constants. They do not by themselves constitute a complete theory, but they mark where dimensional estimates suggest quantum-gravitational effects become strong.<ref>{{cite web |title=Planck units |url=https://en.wikipedia.org/wiki/Planck_units |website=Wikipedia |access-date=19 May 2026}}</ref>

== Spacetime resolution ==
Below or near the Planck length, many approaches to quantum gravity suggest that the familiar continuum picture of spacetime may need replacement by discrete, algebraic, causal, or otherwise nonclassical structures.<ref>{{cite book |last=Rovelli |first=Carlo |title=Quantum Gravity |publisher=Cambridge University Press |year=2004 |id=ISBN 978-0-521-83733-0}}</ref>

== Physics role ==
The Planck scale provides a reference point for black-hole thermodynamics, early-universe cosmology, quantum gravity, and searches for possible departures from standard field theory.

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

=References=
{{reflist|3}}

{{Author|Harold Foppele}}

{{Sourceattribution|Physics:Quantum Planck scale|1}}