l_P
E230753
l_P is the standard symbol denoting the Planck length, the fundamental quantum scale of length in theoretical physics.
All labels observed (1)
| Label | Occurrences |
|---|---|
| l_P canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2091470 — 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: l_P Context triple: [Planck length, symbol, l_P]
-
A.
L
The L is a New York City Subway line that runs crosstown through Manhattan and into Brooklyn, including service to neighborhoods such as Canarsie.
-
B.
L
L is the enigmatic, emotionally complex protagonist of Hanne Ørstavik’s novel "Love," whose inner life and perspective drive the story’s exploration of isolation and longing.
-
C.
L
The L is a Chicago 'L' rapid transit line that serves the city’s West Side and western suburbs as part of the Chicago Transit Authority system.
-
D.
L
L is the vehicle registration code used on license plates for the German city and district of Leipzig.
-
E.
PL
PL is the common abbreviation for Japan’s Pacific League, one of the two professional baseball leagues that make up Nippon Professional Baseball.
- 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: l_P Target entity description: l_P is the standard symbol denoting the Planck length, the fundamental quantum scale of length in theoretical physics.
-
A.
L
The L is a New York City Subway line that runs crosstown through Manhattan and into Brooklyn, including service to neighborhoods such as Canarsie.
-
B.
L
L is the enigmatic, emotionally complex protagonist of Hanne Ørstavik’s novel "Love," whose inner life and perspective drive the story’s exploration of isolation and longing.
-
C.
L
The L is a Chicago 'L' rapid transit line that serves the city’s West Side and western suburbs as part of the Chicago Transit Authority system.
-
D.
L
L is the vehicle registration code used on license plates for the German city and district of Leipzig.
-
E.
PL
PL is the common abbreviation for Japan’s Pacific League, one of the two professional baseball leagues that make up Nippon Professional Baseball.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
fundamental physical constant
ⓘ
natural unit of length ⓘ physical constant symbol ⓘ |
| appearsIn |
Heisenberg uncertainty relations with gravity
ⓘ
discussions of spacetime discreteness ⓘ generalized uncertainty principle formulations ⓘ |
| approximateValue | 1.616255e-35 metre ⓘ |
| belongsTo | fundamental constants of nature ⓘ |
| category | length scale ⓘ |
| conceptualMeaning | scale where quantum effects of gravity become significant ⓘ |
| definedBy | Max Planck ⓘ |
| definition | sqrt(hbar * G / c^3) ⓘ |
| denotes | Planck length ⓘ |
| dependsOn |
Newtonian gravitational constant
ⓘ
linked to:
Newtonian gravitational constant G
reduced Planck constant ⓘ speed of light in vacuum ⓘ |
| dimension | L ⓘ |
| field |
Planck units
ⓘ
quantum gravity ⓘ theoretical physics ⓘ |
| introducedIn |
Planck unit system
ⓘ
linked to:
Planck units
|
| isPlanckUnit | true ⓘ |
| isQuantumGravityScale | true ⓘ |
| isSmallestMeaningfulLengthScaleIn | many quantum gravity theories ⓘ |
| lowerBoundFor | possible resolution of spacetime in some models ⓘ |
| namedAfter | Max Planck ⓘ |
| orderOfMagnitude | 10^-35 metre ⓘ |
| partOf |
Planck unit system
ⓘ
linked to:
Planck units
|
| relatedTo |
Planck energy
ⓘ
Planck mass ⓘ Planck time ⓘ |
| role | fundamental quantum scale of length ⓘ |
| SIUnit | metre ⓘ |
| status | not directly measurable with current technology ⓘ |
| symbol | l_P ⓘ |
| usedIn |
black hole physics
ⓘ
loop quantum gravity ⓘ quantum cosmology ⓘ string theory ⓘ |
| usesSymbol |
G
ⓘ
c ⓘ ħ ⓘ |
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: l_P Description of subject: l_P is the standard symbol denoting the Planck length, the fundamental quantum scale of length in theoretical physics.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.