Faraday effect
E107232
The Faraday effect is a magneto-optical phenomenon in which the polarization plane of light is rotated as it passes through a material under the influence of a magnetic field aligned with the direction of propagation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Faraday effect canonical | 2 |
| Faraday rotation | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T908006 — 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: Faraday effect Context triple: [Michael Faraday, knownFor, Faraday effect]
-
A.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
B.
Stark effect
The Stark effect is the splitting and shifting of atomic or molecular spectral lines caused by an external electric field.
-
C.
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.
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D.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
-
E.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
- 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: Faraday effect Target entity description: The Faraday effect is a magneto-optical phenomenon in which the polarization plane of light is rotated as it passes through a material under the influence of a magnetic field aligned with the direction of propagation.
-
A.
Zeeman effect
The Zeeman effect is the splitting of atomic or molecular spectral lines into multiple components when subjected to an external magnetic field, revealing information about energy levels and magnetic moments.
-
B.
Stark effect
The Stark effect is the splitting and shifting of atomic or molecular spectral lines caused by an external electric field.
-
C.
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.
-
D.
Szilard–Chalmers effect
The Szilard–Chalmers effect is a nuclear chemistry phenomenon in which atoms that undergo neutron capture and become radioactive are chemically separated from their original, non-activated atoms due to recoil-induced disruption of their chemical bonds.
-
E.
de Haas–van Alphen effect
The de Haas–van Alphen effect is a quantum oscillatory phenomenon in metals where the magnetization varies periodically with applied magnetic field, allowing precise mapping of the electronic structure and Fermi surface.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
magneto-optical effect
ⓘ
nonlinear optics phenomenon ⓘ physical phenomenon ⓘ |
| alsoKnownAs |
Faraday effect
ⓘ
surface form:
Faraday rotation
|
| astrophysicalApplication |
Faraday rotation of polarized radio waves in space
ⓘ
measurement of interstellar magnetic fields ⓘ |
| canBeObservedWith | circularly polarized eigenmodes in the medium ⓘ |
| category | magneto-optics ⓘ |
| dependsOn |
Verdet constant of the material
ⓘ
magnetic field strength ⓘ path length through the material ⓘ wavelength of light ⓘ |
| describes | rotation of the plane of polarization of light ⓘ |
| discoveredBy | Michael Faraday ⓘ |
| discoveryYear | 1845 ⓘ |
| field |
electromagnetism
ⓘ
optics ⓘ |
| isLinearIn | magnetic field for weak fields ⓘ |
| isNonreciprocal | true ⓘ |
| materialParameter | Verdet constant ⓘ |
| mathematicalForm | θ = V B L ⓘ |
| measuredBy | polarimetry ⓘ |
| namedAfter | Michael Faraday ⓘ |
| occursFor | linearly polarized light ⓘ |
| occursIn |
gases
ⓘ
liquids ⓘ plasmas ⓘ solids ⓘ transparent material ⓘ |
| physicalOrigin |
different refractive indices for left and right circularly polarized light
ⓘ
magnetically induced circular birefringence ⓘ |
| relatedTo |
Cotton–Mouton effect
ⓘ
Kerr effect ⓘ Zeeman effect ⓘ magneto-optical Kerr effect ⓘ |
| requires | magnetic field parallel to direction of light propagation ⓘ |
| significance | first experimental evidence linking light and electromagnetism ⓘ |
| symbolDefinition |
B is the magnetic flux density
ⓘ
L is the path length in the medium ⓘ V is the Verdet constant ⓘ θ is the rotation angle of polarization ⓘ |
| usedIn |
current sensors
ⓘ
laser systems ⓘ magnetic field sensors ⓘ magneto-optical imaging ⓘ magneto-optical sensors ⓘ optical circulators ⓘ optical isolators ⓘ telecommunications devices ⓘ |
| VerdetConstantUnits | radians per tesla per meter ⓘ |
| violates | time-reversal symmetry in light propagation ⓘ |
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: Faraday effect Description of subject: The Faraday effect is a magneto-optical phenomenon in which the polarization plane of light is rotated as it passes through a material under the influence of a magnetic field aligned with the direction of propagation.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Faraday rotation
this entity surface form:
Faraday rotation