Larmor formula
E402674
The Larmor formula is a fundamental result in classical electrodynamics that gives the power radiated by an accelerating electric charge.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Larmor formula canonical | 2 |
| Larmor radiation | 1 |
| Liénard formula for relativistic charges | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3945697 — 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: Larmor formula Context triple: [Joseph Larmor, knownFor, Larmor formula]
-
A.
Poynting vector
The Poynting vector is a fundamental quantity in electromagnetism that represents the directional energy flux (power per unit area) carried by an electromagnetic field.
-
B.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
-
C.
Poynting theorem
The Poynting theorem is a fundamental principle in electromagnetism that expresses the conservation of electromagnetic energy by relating the flow of energy, energy density, and work done on charges.
-
D.
Klein–Nishina formula
The Klein–Nishina formula is a fundamental result in quantum electrodynamics that gives the differential cross section for Compton scattering of photons by free electrons, incorporating relativistic and quantum effects.
-
E.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
- 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: Larmor formula Target entity description: The Larmor formula is a fundamental result in classical electrodynamics that gives the power radiated by an accelerating electric charge.
-
A.
Poynting vector
The Poynting vector is a fundamental quantity in electromagnetism that represents the directional energy flux (power per unit area) carried by an electromagnetic field.
-
B.
Lorentz force
The Lorentz force is the fundamental force experienced by a charged particle moving in electric and magnetic fields, forming the basis of classical electromagnetism.
-
C.
Poynting theorem
The Poynting theorem is a fundamental principle in electromagnetism that expresses the conservation of electromagnetic energy by relating the flow of energy, energy density, and work done on charges.
-
D.
Klein–Nishina formula
The Klein–Nishina formula is a fundamental result in quantum electrodynamics that gives the differential cross section for Compton scattering of photons by free electrons, incorporating relativistic and quantum effects.
-
E.
Ampère's force law
Ampère's force law is a fundamental principle in electromagnetism that quantifies the mechanical force between electric currents in conductors.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
physical law
ⓘ
result in classical electrodynamics ⓘ |
| appliesTo | non-relativistic point charge ⓘ |
| approximationType | non-relativistic approximation ⓘ |
| assumes |
classical point charge
ⓘ
flat spacetime ⓘ non-relativistic velocities ⓘ vacuum ⓘ |
| category |
electromagnetic radiation formulas
ⓘ
power formulas in physics ⓘ |
| concerns |
accelerated charges
ⓘ
electromagnetic radiation ⓘ |
| dependsOn |
square of the acceleration magnitude
ⓘ
square of the charge ⓘ |
| derivedFrom |
Lienard–Wiechert potentials
ⓘ
Maxwell equations ⓘ
linked to:
Maxwell's equations
Poynting vector ⓘ |
| describes | power radiated by an accelerating electric charge ⓘ |
| expresses | radiated power in terms of charge and acceleration ⓘ |
| field | classical electrodynamics ⓘ |
| framework | classical electromagnetism ⓘ |
| generalizedBy |
Liénard formula for relativistic charges
ⓘ
linked to:
Larmor formula
|
| gives | total power radiated by an accelerating charge ⓘ |
| hasNonRelativisticForm |
P = (2/3)(q^2 a^2)/(4π ε0 c^3) in SI units
ⓘ
P = (2/3)(q^2 a^2)/c^3 in Gaussian units ⓘ |
| implies | uniformly moving charge does not radiate ⓘ |
| independentOf |
direction of acceleration
ⓘ
sign of the charge ⓘ |
| introducedBy | Joseph Larmor ⓘ |
| namedAfter | Joseph Larmor ⓘ |
| publicationCentury | 19th century ⓘ |
| relatedTo |
Bremsstrahlung
ⓘ
Larmor radiation ⓘ
linked to:
Larmor formula
Liénard formula ⓘ synchrotron radiation ⓘ |
| unitSystem |
Gaussian units
ⓘ
SI units ⓘ
linked to:
International System of Units
|
| usedIn |
accelerator physics
ⓘ
antenna theory ⓘ astrophysics ⓘ classical radiation theory ⓘ plasma physics ⓘ radiation reaction analysis ⓘ |
| usedToExplain |
classical electron radiation losses
ⓘ
energy loss of accelerated charges ⓘ radiation damping ⓘ |
| validIn | inertial reference frame ⓘ |
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: Larmor formula Description of subject: The Larmor formula is a fundamental result in classical electrodynamics that gives the power radiated by an accelerating electric charge.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.