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Arago spot

bright point that appears at the center of a circular object's shadow due to Fresnel diffraction
Thing phenomenon Q1807778
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Arago spot

Summary

Arago spot is a phenomenon[1]. It draws 119 Wikipedia views per month (phenomenon category, ranking #92 of 290).[2]

Key Facts

  • Arago spot's video is recorded as Formation of the Arago spot.webm[3].
  • Arago spot's image is recorded as Poissonspot simulation d1mm.jpg[4].
  • Arago spot's instance of is recorded as phenomenon[5].
  • François Arago is named after Arago spot[6].
  • Augustin-Jean Fresnel is named after Arago spot[7].
  • Siméon Denis Poisson is named after Arago spot[8].
  • Arago spot's subclass of is recorded as optical phenomenon[9].
  • Arago spot's Commons category is recorded as Arago spot[10].
  • Arago spot's Freebase ID is recorded as /m/0c55f[11].
  • Arago spot's has cause is recorded as Fresnel diffraction[12].
  • Arago spot's Encyclopædia Britannica Online ID is recorded as science/Poissons-spot[13].
  • Arago spot's schematic is recorded as Poissonspot setup treisinger hu.png[14].
  • Arago spot's schematic is recorded as Poissonspot setup treisinger-es.jpg[15].
  • Arago spot's schematic is recorded as Poissonspot setup treisinger.jpg[16].
  • Arago spot's Microsoft Academic ID is recorded as 41484392[17].

Why It Matters

Arago spot draws 119 Wikipedia views per month (phenomenon category, ranking #92 of 290).[2] It has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[18] It is known by 13 alternative names across languages and contexts.[19]

Related Entities

Augustin-Jean Fresnel François Arago Siméon Denis Poisson

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . Freebase Data Dumps. wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [18] ↑ . Wikidata sitelinks. wikidata.org.
  3. [19] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Arago spot. Retrieved May 3, 2026, from https://4ort.xyz/entity/arago-spot
MLA “Arago spot.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/arago-spot.
BibTeX @misc{4ortxyz_arago-spot_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Arago spot}}, year = {2026}, url = {https://4ort.xyz/entity/arago-spot}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Arago spot — https://4ort.xyz/entity/arago-spot (retrieved 2026-05-03)

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