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.

AI illustration

How this image was made

AI-generated illustration of Poisson spot

This AI-generated illustration was produced by black-forest-labs/FLUX.2-dev (1024x1024) from a prompt written by openai/gpt-oss-120b from the entity's label + description.

Prompt

Generate an image of 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.)

All labels observed (7)

How this entity was disambiguated

Statements (46)

Predicate Object
instanceOf diffraction phenomenon ⓘ
optical phenomenon ⓘ
alsoKnownAs Arago spot ⓘ
linked to: Poisson spot

Fresnel bright spot ⓘ
linked to: Poisson 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 Arago–Poisson spot ⓘ
linked to: Poisson spot
hasAlternativeSpelling Poisson’s spot ⓘ
linked to: Poisson spot
hasCategory physical optics ⓘ
wave optics ⓘ
hasDiscoveryContext 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 ⓘ
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 François Arago ⓘ
linked to: Hippolyte Fizeau

How these facts were elicited

Referenced by (7)

Full triples — surface form annotated when it differs from this entity's canonical label.

Poisson spot → alsoKnownAs → Arago spot ⓘ
linked to: Poisson spot
Poisson spot → alsoKnownAs → Fresnel bright spot ⓘ
linked to: Poisson spot
Poisson spot → hasAlternativeSpelling → Poisson’s spot ⓘ
linked to: Poisson spot
Poisson spot → hasAlternativeName → Arago–Poisson spot ⓘ
linked to: Poisson spot
wave theory of light → explains → Young's double-slit experiment ⓘ
linked to: Poisson spot
François Arago → notableWork → Arago spot (Poisson spot) in diffraction ⓘ
linked to: Poisson spot