Planck volume
E230756
The Planck volume is the extremely tiny three-dimensional space defined by the cube of the Planck length, often considered a fundamental quantum of volume in theoretical physics.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Planck volume canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2091498 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Planck volume Context triple: [Planck length, relatedConcept, Planck volume]
-
A.
Planck units
Planck units are a system of natural units in physics where fundamental constants like the speed of light, gravitational constant, and Planck constant are normalized to 1, providing a scale-free framework for describing physical laws.
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B.
Planck length
The Planck length is the fundamental unit of length in quantum gravity, representing the scale at which classical concepts of space and time are expected to break down.
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C.
Planck mass
The Planck mass is a fundamental physical constant representing the mass scale at which quantum gravitational effects are expected to become significant, derived from combinations of the speed of light, Planck’s constant, and the gravitational constant.
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D.
Planck time
Planck time is the fundamental unit of time in the system of Planck units, representing the shortest meaningful interval of time according to current physical theories, where quantum effects of gravity become significant.
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E.
Planck energy
Planck energy is the fundamental energy scale in physics, derived from universal constants, at which quantum gravitational effects are expected to become significant.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Planck volume Target entity description: The Planck volume is the extremely tiny three-dimensional space defined by the cube of the Planck length, often considered a fundamental quantum of volume in theoretical physics.
-
A.
Planck units
Planck units are a system of natural units in physics where fundamental constants like the speed of light, gravitational constant, and Planck constant are normalized to 1, providing a scale-free framework for describing physical laws.
-
B.
Planck length
The Planck length is the fundamental unit of length in quantum gravity, representing the scale at which classical concepts of space and time are expected to break down.
-
C.
Planck mass
The Planck mass is a fundamental physical constant representing the mass scale at which quantum gravitational effects are expected to become significant, derived from combinations of the speed of light, Planck’s constant, and the gravitational constant.
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D.
Planck time
Planck time is the fundamental unit of time in the system of Planck units, representing the shortest meaningful interval of time according to current physical theories, where quantum effects of gravity become significant.
-
E.
Planck energy
Planck energy is the fundamental energy scale in physics, derived from universal constants, at which quantum gravitational effects are expected to become significant.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Planck unit
ⓘ
derived unit ⓘ physical quantity ⓘ |
| approximateSideLength |
Planck length
ⓘ
surface form:
Planck length ≈ 1.616255×10^-35 m
|
| approximateSideLengthOrderOfMagnitude | 10^-35 m ⓘ |
| approximateVolumeInCubicCentimetres | approximately 4.22×10^-99 cm^3 ⓘ |
| associatedScale | Planck scale ⓘ |
| associatedWith |
quantum properties of spacetime
ⓘ
unification of quantum mechanics and general relativity ⓘ |
| belongsToCategory | fundamental physical constants (derived units) ⓘ |
| conceptRole |
fundamental quantum of volume (heuristic)
ⓘ
natural unit of volume ⓘ |
| constructionMethod | set ℏ = c = G = 1 and take unit volume in Planck units ⓘ |
| definedAs | cube of the Planck length ⓘ |
| definedInTermsOf |
Planck length
ⓘ
gravitational constant G ⓘ reduced Planck constant ⓘ
surface form:
reduced Planck constant ℏ
speed of light c ⓘ |
| dimension | L^3 ⓘ |
| expressionInSIBaseUnits |
(ℏ G / c^3)^{3/2}
ⓘ
(ℏ^{3/2} G^{3/2}) / c^{9/2} ⓘ |
| field |
cosmology
ⓘ
high-energy physics ⓘ quantum gravity ⓘ theoretical physics ⓘ |
| hasLog10ValueInCubicMetres | approximately -104.375 ⓘ |
| isMuchSmallerThan |
atomic volume
ⓘ
nuclear volume ⓘ |
| namedAfter | Max Planck ⓘ |
| numericalValue | approximately 4.22×10^-105 m^3 ⓘ |
| orderOfMagnitude | 10^-105 cubic metres ⓘ |
| relatedQuantity |
Planck area
ⓘ
Planck energy ⓘ Planck length ⓘ Planck mass ⓘ Planck time ⓘ |
| relatedSystem | Planck units ⓘ |
| scaleDescription | extremely small volume scale ⓘ |
| SIBaseDimensions | m^3 ⓘ |
| statusInExperiment | far below current experimental accessibility ⓘ |
| statusInPhysics | theoretical construct ⓘ |
| symbol |
V_P
ⓘ
l_P^3 ⓘ |
| unitSystem | natural units ⓘ |
| usedIn |
Planck scale
ⓘ
surface form:
Planck-scale cosmology
discussions of spacetime discreteness ⓘ loop quantum gravity ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Planck volume Description of subject: The Planck volume is the extremely tiny three-dimensional space defined by the cube of the Planck length, often considered a fundamental quantum of volume in theoretical physics.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.