Planck time
E33407
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Planck time canonical | 13 |
| Planck era of the universe | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T244045 — 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 time Context triple: [Newtonian gravitational constant G, usedToDefine, Planck time]
-
A.
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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B.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
-
C.
reduced Planck constant
The reduced Planck constant (ħ) is a fundamental physical constant that quantifies the scale of quantum effects, commonly appearing in formulations of quantum mechanics and quantum field theory.
-
D.
Schwarzschild radius
The Schwarzschild radius is the critical distance from the center of a non-rotating, spherically symmetric mass at which its escape velocity equals the speed of light, defining the boundary of a black hole.
-
E.
Bekenstein bound
The Bekenstein bound is a theoretical limit in physics on the maximum amount of information or entropy that can be contained within a finite region of space with a given amount of energy.
- 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 time Target entity description: 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.
-
A.
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.
-
B.
Planck constant
The Planck constant is a fundamental physical constant that quantifies the relationship between the energy of a photon and the frequency of its associated electromagnetic wave, forming a cornerstone of quantum mechanics.
-
C.
reduced Planck constant
The reduced Planck constant (ħ) is a fundamental physical constant that quantifies the scale of quantum effects, commonly appearing in formulations of quantum mechanics and quantum field theory.
-
D.
Schwarzschild radius
The Schwarzschild radius is the critical distance from the center of a non-rotating, spherically symmetric mass at which its escape velocity equals the speed of light, defining the boundary of a black hole.
-
E.
Bekenstein bound
The Bekenstein bound is a theoretical limit in physics on the maximum amount of information or entropy that can be contained within a finite region of space with a given amount of energy.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Planck unit
ⓘ
physical constant ⓘ unit of time ⓘ |
| appearsIn |
Planck epoch in cosmology
ⓘ
discussions of the early universe ⓘ |
| belongsToCategory |
fundamental physical constants
ⓘ
time scales in physics ⓘ |
| definedBy | Max Planck ⓘ |
| dependsOnConstant |
gravitational constant
ⓘ
reduced Planck constant ⓘ speed of light in vacuum ⓘ |
| hasApproximateValue | 5.391247×10^-44 s ⓘ |
| hasApproximateValueOrderOfMagnitude | 10^-43 s ⓘ |
| hasDimension | time ⓘ |
| hasFormula | t_P = sqrt(ħ G / c^5) ⓘ |
| isDefinedUsing |
G
ⓘ
c ⓘ ħ ⓘ |
| isEpochBoundaryFor |
Planck time
self-linksurface differs
ⓘ
surface form:
Planck era of the universe
|
| isExampleOf | natural unit constructed from fundamental constants ⓘ |
| isFundamentalUnitIn |
Planck units
ⓘ
surface form:
Planck unit system
natural units ⓘ |
| isIndependentOf | arbitrary human conventions ⓘ |
| isMuchSmallerThan |
timescales accessible to experiments
ⓘ
timescales of particle collisions in current accelerators ⓘ |
| isNamedAfter | Max Planck ⓘ |
| isScaleWhere |
classical general relativity breaks down
ⓘ
quantum field theory in curved spacetime becomes inadequate ⓘ quantum gravity effects become significant ⓘ |
| isShortestMeaningfulIntervalIn | current physical theories ⓘ |
| isTheoreticalLimitFor | applicability of known physics ⓘ |
| isTimeLightTravels | one Planck length in vacuum ⓘ |
| measuredIn | seconds ⓘ |
| partOf | Planck units ⓘ |
| relatedTo |
Planck energy
ⓘ
Planck length ⓘ Planck mass ⓘ Planck temperature ⓘ |
| symbol | t_P ⓘ |
| usedAs | natural time scale ⓘ |
| usedIn |
cosmology
ⓘ
loop quantum gravity ⓘ quantum gravity ⓘ string theory ⓘ theoretical physics ⓘ |
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 time Description of subject: 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.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Planck era of the universe