R∞
E629516
R∞ is the Rydberg constant, a fundamental physical constant that characterizes the limiting value of the highest wavenumber (or lowest wavelength) of any photon that can be emitted from the hydrogen atom.
All labels observed (1)
| Label | Occurrences |
|---|---|
| R∞ canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6938836 — 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: R∞ Context triple: [Rydberg constant, symbol, R∞]
-
A.
R5
R5 is the U.S. Forest Service’s Pacific Southwest Region, which oversees national forests primarily in California and parts of neighboring areas.
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B.
R5
R5 is a government office building in Oslo that forms part of Norway’s central Regjeringskvartalet complex.
-
C.
R-4
The R-4 is a World War II–era Sikorsky helicopter recognized as the first mass-produced helicopter and the first to be used operationally by the U.S. military.
-
D.
R4
R4 is a government office building in Oslo that forms part of Norway’s central Regjeringskvartalet complex.
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E.
R8
The Audi R8 is a high-performance mid-engine sports car known for its powerful engines, quattro all-wheel drive, and use of advanced lightweight construction.
- 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: R∞ Target entity description: R∞ is the Rydberg constant, a fundamental physical constant that characterizes the limiting value of the highest wavenumber (or lowest wavelength) of any photon that can be emitted from the hydrogen atom.
-
A.
R5
R5 is the U.S. Forest Service’s Pacific Southwest Region, which oversees national forests primarily in California and parts of neighboring areas.
-
B.
R5
R5 is a government office building in Oslo that forms part of Norway’s central Regjeringskvartalet complex.
-
C.
R5
R5 was a former designation for a commuter rail line in the SEPTA Regional Rail system serving the Paoli/Thorndale corridor in the Philadelphia area.
-
D.
R-4
The R-4 is a World War II–era Sikorsky helicopter recognized as the first mass-produced helicopter and the first to be used operationally by the U.S. military.
-
E.
R4
R4 is a government office building in Oslo that forms part of Norway’s central Regjeringskvartalet complex.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
fundamental constant
ⓘ
physical constant ⓘ spectroscopic constant ⓘ |
| abbreviationOf | Rydberg constant for infinite mass ⓘ |
| alsoKnownAs | Rydberg constant for infinite nuclear mass ⓘ |
| appearsInFormula |
1/λ = R∞ (1/n₁² − 1/n₂²)
ⓘ
Eₙ = −hcR∞/n² for hydrogen in infinite nuclear mass limit ⓘ |
| appliesTo |
hydrogen atom
ⓘ
one‑electron atoms in the infinite nuclear mass limit ⓘ |
| belongsTo | International System of Quantities ⓘ |
| characterizes |
limiting value of highest wavenumber of photons from hydrogen
ⓘ
limiting value of lowest wavelength of photons from hydrogen ⓘ |
| contrastsWith | R_H ⓘ |
| differenceFrom |
R_H includes reduced mass correction for hydrogen nucleus
ⓘ
linked to:
Rydberg constant
|
| field |
atomic physics
ⓘ
fundamental metrology ⓘ spectroscopy ⓘ |
| hasExpression |
R∞ = mₑ e⁴ / (8 ε₀² h³ c)
ⓘ
R∞ = α² mₑ c / (2h) ⓘ |
| hasPhysicalQuantityType | wavenumber ⓘ |
| hasRole | scale factor for hydrogenic spectra ⓘ |
| hasSIUnit | per metre ⓘ |
| hasSIUnitSymbol | m⁻¹ ⓘ |
| isDefinedAs | limiting wavenumber of the Lyman series of hydrogen ⓘ |
| isDimension | L⁻¹ ⓘ |
| isFor | nuclear mass taken as infinite ⓘ |
| isMaintainedBy | Committee on Data for Science and Technology ⓘ |
| isMeasuredBy | high‑precision spectroscopy of hydrogen and deuterium ⓘ |
| isOneOf | most accurately known physical constants ⓘ |
| isPositive | true ⓘ |
| namedAfter | Johannes Rydberg ⓘ |
| relatedTo |
Planck constant h
ⓘ
linked to:
Planck constant
electron mass mₑ ⓘ elementary charge e ⓘ fine‑structure constant α ⓘ speed of light c ⓘ vacuum permittivity ε₀ ⓘ |
| symbolOf | Rydberg constant ⓘ |
| usedIn |
atomic spectroscopy
ⓘ
determination of other fundamental constants ⓘ precision tests of quantum electrodynamics ⓘ quantum mechanics ⓘ |
| usedToCalculate |
energy levels of hydrogen‑like atoms
ⓘ
ionization energy of hydrogen ⓘ spectral line positions in hydrogen ⓘ |
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: R∞ Description of subject: R∞ is the Rydberg constant, a fundamental physical constant that characterizes the limiting value of the highest wavenumber (or lowest wavelength) of any photon that can be emitted from the hydrogen atom.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.