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.
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's equations
ⓘ
surface form:
Maxwell theory
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 ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.