Babinet's principle
E131280
Babinet's principle is a fundamental concept in wave optics stating that the diffraction pattern from an opaque object is identical to that from a complementary aperture of the same shape, apart from the overall intensity.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Babinet's principle canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1144870 — 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: Babinet's principle Context triple: [Poisson spot, isRelatedTo, Babinet's principle]
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A.
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.
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B.
Kirchhoff diffraction theory
Kirchhoff diffraction theory is a classical wave optics framework that models light propagation and diffraction by treating wavefronts as superpositions of secondary spherical waves emitted from an aperture.
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C.
Poisson spot
Poisson spot is a bright point of light that appears at the center of the shadow of a circular object due to wave diffraction, providing striking evidence for the wave nature of light.
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D.
Snell’s law of refraction
Snell’s law of refraction is a fundamental principle in optics that relates the angles of incidence and refraction to the refractive indices of two media, governing how light bends when passing between them.
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E.
Newtonian optics
Newtonian optics is the branch of physics developed by Isaac Newton that explains light primarily as a stream of particles to account for reflection, refraction, and color phenomena.
- 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: Babinet's principle Target entity description: Babinet's principle is a fundamental concept in wave optics stating that the diffraction pattern from an opaque object is identical to that from a complementary aperture of the same shape, apart from the overall intensity.
-
A.
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.
-
B.
Kirchhoff diffraction theory
Kirchhoff diffraction theory is a classical wave optics framework that models light propagation and diffraction by treating wavefronts as superpositions of secondary spherical waves emitted from an aperture.
-
C.
Poisson spot
Poisson spot is a bright point of light that appears at the center of the shadow of a circular object due to wave diffraction, providing striking evidence for the wave nature of light.
-
D.
Snell’s law of refraction
Snell’s law of refraction is a fundamental principle in optics that relates the angles of incidence and refraction to the refractive indices of two media, governing how light bends when passing between them.
-
E.
Newtonian optics
Newtonian optics is the branch of physics developed by Isaac Newton that explains light primarily as a stream of particles to account for reflection, refraction, and color phenomena.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
physical principle
ⓘ
principle of wave optics ⓘ |
| appliesTo |
diffraction
ⓘ
electromagnetic waves ⓘ scalar waves ⓘ wave propagation ⓘ |
| assumes |
far-field (Fraunhofer) conditions in common derivations
ⓘ
linearity of the wave equation ⓘ superposition principle ⓘ |
| category |
classical electromagnetism
ⓘ
physical optics ⓘ |
| coreIdea |
the diffraction pattern from an opaque object is identical to that from its complementary aperture apart from overall intensity
ⓘ
the sum of fields diffracted by a screen and its complementary aperture equals the field that would exist without any obstacle ⓘ |
| countryOfOrigin | France ⓘ |
| describedIn |
electromagnetic theory textbooks
ⓘ
standard optics textbooks ⓘ |
| field |
electromagnetism
ⓘ
optics ⓘ wave optics ⓘ |
| formulatedBy | Jacques Babinet ⓘ |
| hasLimitation |
does not directly account for partial transparency or complex material responses without modification
ⓘ
near-field patterns of complementary structures are not generally identical ⓘ |
| historicalPeriod | 19th century ⓘ |
| influenced |
aperture-antenna duality concepts
ⓘ
development of scalar diffraction theory ⓘ |
| mathematicalFormulation | U_screen + U_complement = U_0, where U denotes complex field amplitudes ⓘ |
| namedAfter | Jacques Babinet ⓘ |
| relatedTo |
Fraunhofer diffraction
ⓘ
Fresnel diffraction ⓘ
linked to:
Fresnel diffraction theory
Huygens–Fresnel principle ⓘ superposition principle ⓘ |
| relatesConcept |
complementary apertures
ⓘ
diffraction pattern ⓘ interference ⓘ opaque obstacles ⓘ |
| usedFor |
predicting diffraction from complex shapes using complementary structures
ⓘ
simplifying diffraction calculations ⓘ |
| usedIn |
X-ray diffraction analysis
ⓘ
analysis of diffraction gratings ⓘ antenna theory ⓘ aperture synthesis ⓘ design of optical elements ⓘ holography ⓘ microwave engineering ⓘ |
| validWhen |
incident field is the same for object and complementary aperture
ⓘ
materials are perfectly absorbing or perfectly conducting in simple formulations ⓘ |
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: Babinet's principle Description of subject: Babinet's principle is a fundamental concept in wave optics stating that the diffraction pattern from an opaque object is identical to that from a complementary aperture of the same shape, apart from the overall intensity.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.