Poisson spot
E23540
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.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Arago spot | 1 |
| Arago spot (Poisson spot) in diffraction | 1 |
| Arago–Poisson spot | 1 |
| Fresnel bright spot | 1 |
| Poisson spot canonical | 1 |
| Poisson’s spot | 1 |
| Young's double-slit experiment | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T185489 — 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.
Target entity: Poisson spot Context triple: [Huygens–Fresnel principle, explains, Poisson spot]
-
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.
Hanbury Brown and Twiss effect
The Hanbury Brown and Twiss effect is a quantum optical phenomenon in which correlations in the arrival times of identical particles, such as photons, reveal their underlying statistical and coherence properties.
-
C.
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.
-
D.
Optica
Optica is a leading scientific society dedicated to advancing the study and application of optics and photonics worldwide.
-
E.
Traité de la lumière
Traité de la lumière is a seminal 1690 scientific treatise that presents Christiaan Huygens’ wave theory of light, including the principle now known as Huygens’ principle.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Poisson spot Target entity description: 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.
-
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.
Hanbury Brown and Twiss effect
The Hanbury Brown and Twiss effect is a quantum optical phenomenon in which correlations in the arrival times of identical particles, such as photons, reveal their underlying statistical and coherence properties.
-
C.
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.
-
D.
Optica
Optica is a leading scientific society dedicated to advancing the study and application of optics and photonics worldwide.
-
E.
Traité de la lumière
Traité de la lumière is a seminal 1690 scientific treatise that presents Christiaan Huygens’ wave theory of light, including the principle now known as Huygens’ principle.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
diffraction phenomenon
ⓘ
optical phenomenon ⓘ |
| alsoKnownAs |
Poisson spot
ⓘ
surface form:
Arago spot
Poisson spot ⓘ
surface form:
Fresnel bright spot
|
| appearsFor |
circular disks
ⓘ
spherical obstacles ⓘ |
| appearsIn | geometrical shadow region ⓘ |
| canBeObservedIn |
X-rays
ⓘ
matter waves ⓘ visible light ⓘ |
| causedBy | wave diffraction ⓘ |
| challenged | Newtonian corpuscular theory of light ⓘ |
| dependsOn |
diameter of the circular obstacle
ⓘ
distance between obstacle and observation screen ⓘ wavelength of light ⓘ |
| hasAlternativeName |
Poisson spot
ⓘ
surface form:
Arago–Poisson spot
|
| hasAlternativeSpelling |
Poisson spot
self-linksurface differs
ⓘ
surface form:
Poisson’s spot
|
| hasCategory |
physical optics
ⓘ
wave optics ⓘ |
| hasDiscoveryContext |
Fresnel diffraction theory
ⓘ
surface form:
Fresnel–Poisson diffraction experiment
|
| hasEffect | central bright fringe in shadow pattern ⓘ |
| hasHistoricalSignificance | confirmation of Fresnel's wave theory of light ⓘ |
| hasIntensity | maximum at the shadow center ⓘ |
| hasMathematicalDescription | Bessel function intensity distribution ⓘ |
| hasPhysicalNature | bright point of light ⓘ |
| isExampleOf | constructive interference in a shadow region ⓘ |
| isExplainedBy | Huygens–Fresnel principle ⓘ |
| isNamedAfter | Siméon Denis Poisson ⓘ |
| isObservedWith |
laser light
ⓘ
sunlight under suitable conditions ⓘ |
| isPredictedBy | wave theory of light ⓘ |
| isRelatedTo |
Airy disk
ⓘ
Babinet's principle ⓘ Fraunhofer diffraction ⓘ Fresnel diffraction theory ⓘ
surface form:
Fresnel diffraction
interference of light waves ⓘ |
| isUsedIn |
demonstrations of wave–particle duality
ⓘ
optics education experiments ⓘ |
| occursAt | center of the shadow of a circular object ⓘ |
| providesEvidenceFor | wave nature of light ⓘ |
| requires |
approximately monochromatic light
ⓘ
coherent illumination ⓘ opaque circular obstacle ⓘ |
| requiresCondition |
far-field or near-field diffraction geometry depending on setup
ⓘ
obstacle size comparable to several wavelengths ⓘ |
| wasExperimentallyConfirmedBy |
Hippolyte Fizeau
ⓘ
surface form:
François Arago
|
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.
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.
Subject: Poisson spot Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.