Poynting vector
E73653
The Poynting vector is a fundamental quantity in electromagnetism that represents the directional energy flux (power per unit area) carried by an electromagnetic field.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Poynting vector canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T587723 — 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: Poynting vector Context triple: [Maxwell stress tensor, relatedTo, Poynting vector]
-
A.
Maxwell stress tensor
The Maxwell stress tensor is a mathematical construct in classical electromagnetism that represents how electric and magnetic fields transmit mechanical stresses, such as pressure and tension, through space and matter.
-
B.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
-
C.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
-
D.
Gauss’s law
Gauss’s law is a fundamental principle of electromagnetism that relates the electric flux through a closed surface to the electric charge enclosed within that surface.
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E.
Huygens–Fresnel principle
The Huygens–Fresnel principle is a fundamental concept in wave optics that explains how every point on a wavefront acts as a source of secondary wavelets whose interference determines the wave’s subsequent propagation and diffraction.
- 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: Poynting vector Target entity description: The Poynting vector is a fundamental quantity in electromagnetism that represents the directional energy flux (power per unit area) carried by an electromagnetic field.
-
A.
Maxwell stress tensor
The Maxwell stress tensor is a mathematical construct in classical electromagnetism that represents how electric and magnetic fields transmit mechanical stresses, such as pressure and tension, through space and matter.
-
B.
Maxwell's equations
Maxwell's equations are the fundamental set of four equations in classical electromagnetism that describe how electric and magnetic fields are generated and interact with charges and currents.
-
C.
Ampère–Maxwell law
The Ampère–Maxwell law is one of Maxwell’s equations that relates magnetic fields to electric currents and changing electric fields, thereby introducing the concept of displacement current and enabling the prediction of electromagnetic waves.
-
D.
Gauss’s law
Gauss’s law is a fundamental principle of electromagnetism that relates the electric flux through a closed surface to the electric charge enclosed within that surface.
-
E.
Huygens–Fresnel principle
The Huygens–Fresnel principle is a fundamental concept in wave optics that explains how every point on a wavefront acts as a source of secondary wavelets whose interference determines the wave’s subsequent propagation and diffraction.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
physical quantity
ⓘ
vector field ⓘ |
| appliesTo |
static electromagnetic fields
ⓘ
time-varying electromagnetic fields ⓘ |
| dependsOn |
electric field vector E
ⓘ
magnetic field intensity H ⓘ |
| fieldOfStudy | electromagnetism ⓘ |
| hasAlternativeSymbol | N ⓘ |
| hasDimension | power per area ⓘ |
| hasPhysicalDimensionSymbol | M¹T⁻³ ⓘ |
| hasSIUnit | watt per square metre ⓘ |
| hasSIUnitSymbol | W·m⁻² ⓘ |
| hasSymbol | S ⓘ |
| isComponentOf | Poynting theorem ⓘ |
| isDefinedIn |
Maxwell theory
ⓘ
linked to:
Maxwell's equations
classical electromagnetism ⓘ |
| isDefinedRelativeTo | right-hand rule for cross product ⓘ |
| isDirectionOf | energy propagation of an electromagnetic wave ⓘ |
| isGivenBy | S = E × H in SI units ⓘ |
| isOrthogonalTo |
electric field in a plane electromagnetic wave in vacuum
ⓘ
magnetic field in a plane electromagnetic wave in vacuum ⓘ |
| isParallelTo | wave propagation direction in a plane wave in vacuum ⓘ |
| isPartOf | electromagnetic stress–energy tensor ⓘ |
| isRelatedTo |
electric field
ⓘ
electromagnetic field ⓘ energy density of electromagnetic fields ⓘ magnetic field ⓘ momentum density of electromagnetic fields ⓘ stress–energy tensor in electromagnetism ⓘ |
| isUsedIn |
antenna theory
ⓘ
electromagnetic power flow calculations ⓘ electromagnetic radiation analysis ⓘ energy conservation in electromagnetism ⓘ microwave engineering ⓘ optics ⓘ photon flux interpretation in quantum optics ⓘ radiation pressure analysis ⓘ relativistic electrodynamics ⓘ wave propagation analysis ⓘ waveguide analysis ⓘ |
| isUsedToCompute |
intensity of electromagnetic radiation
ⓘ
radiated power through a surface ⓘ |
| isUsedToDescribe | energy transfer in electromagnetic waves ⓘ |
| namedAfter | John Henry Poynting ⓘ |
| represents |
electromagnetic energy flux density
ⓘ
power per unit area of an electromagnetic field ⓘ |
| wasIntroducedBy | John Henry Poynting ⓘ |
| wasIntroducedIn | 1884 ⓘ |
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: Poynting vector Description of subject: The Poynting vector is a fundamental quantity in electromagnetism that represents the directional energy flux (power per unit area) carried by an electromagnetic field.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.