Louis Essen

English physicist who invented the caesium atomic clock and determined the speed of light (1908-1997)
Person human Q711250
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Louis Essen

Summary

Louis Essen is a human[1]. He was born in Nottingham[2]. He was born on September 6, 1908[3]. He died in Great Bookham[4]. He died on August 24, 1997[5]. He worked as a physicist[6], inventor[7], and cyclist[8]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (66 views/month, #7,287 of 1,000,298).[9]

Key Facts

  • Born in Nottingham[2], Louis Essen…
  • Louis Essen passed away in Great Bookham[4].
  • Louis Essen was born on September 6, 1908[3].
  • Louis Essen died on August 24, 1997[5].
  • Louis Essen held citizenship in United Kingdom[10].
  • Louis Essen's professions included physicist[6].
  • Louis Essen worked as an inventor[7].
  • Louis Essen worked as a cyclist[8].
  • Louis Essen's education included a stint at University of Nottingham[11].
  • Louis Essen was educated at University of London[12].
  • Louis Essen's doctoral advisor was David William Dye[13].
  • A notable work attributed to Louis Essen is speed of light in vacuum[14].
  • Louis Essen received the Fellow of the Royal Society[15].
  • Louis Essen received the Officer of the Order of the British Empire[16].
  • Louis Essen received the Alexander Popov Gold Medal[17].
  • Louis Essen received the I. I. Rabi Award[18].
  • Louis Essen was a member of Royal Society[19].
  • Louis Essen is recorded as male[20].
  • Louis Essen's instance of is recorded as human[21].
  • Louis Essen's Commons category is recorded as Louis Essen[22].
  • Louis Essen earned the academic degree of Doctor of Philosophy[23].
  • Louis Essen earned the academic degree of Doctor[24].
  • Louis Essen's family name is recorded as Essen[25].
  • Louis Essen's given name is recorded as Louis[26].
  • Louis Essen's described by source is recorded as Physicists: Biographical Dictionary[27].

Body

Origins and Family

Louis Essen was born in Nottingham[2]. He was born on September 6, 1908[3].

Education

Educated at University of Nottingham[11], a public university[28], in United Kingdom[29], founded in 1881[30], headquartered in Nottingham[31] and University of London[12], a university[32], in United Kingdom[33], founded in 1836[34], headquartered in London[35]. Louis Essen's doctoral advisor was David William Dye[13]. Academic degrees include Doctor of Philosophy[23] and Doctor[24].

Career and Affiliations

Recorded occupations include physicist[6], inventor[7], and cyclist[8].

Works and Contributions

A notable work attributed to Louis Essen is speed of light in vacuum[14].

Recognition

Awards received include Fellow of the Royal Society[15], a fellowship award[36], in United Kingdom[37]; Officer of the Order of the British Empire[16], a grade of an order[38], in United Kingdom[39]; Alexander Popov Gold Medal[17], a science award[40], in Soviet Union[41]; and I. I. Rabi Award[18], an award[42], in United States[43], founded in 1983[44].

Death and Burial

Louis Essen died on August 24, 1997[5]. He died in Great Bookham[4].

Why It Matters

Louis Essen ranks in the top 0.73% of human entities by monthly Wikipedia readership (66 views/month, #7,287 of 1,000,298).[9] He has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[45] He is known by 4 alternative names across languages and contexts.[46]

FAQs

Where was Louis Essen born?

Born in Nottingham[2], Louis Essen…

Where did Louis Essen die?

Louis Essen died in Great Bookham[4].

What did Louis Essen do for work?

Louis Essen worked as physicist[6], inventor[7], and cyclist[8].

Where did Louis Essen go to school?

Louis Essen was educated at University of Nottingham[11] and University of London[12].

What awards did Louis Essen receive?

Honors received include Fellow of the Royal Society[15], Officer of the Order of the British Empire[16], Alexander Popov Gold Medal[17], and I. I. Rabi Award[18].

References

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

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [4] . wikidata.org.
  3. [20] . wikidata.org.
  4. [10] . wikidata.org.
  5. [21] . wikidata.org.
  6. [11] . wikidata.org.
  7. [12] . wikidata.org.
  8. [6] . wikidata.org.
  9. [7] . Retrieved . wikidata.org.
  10. [8] . wikidata.org.
  11. [15] . Retrieved . wikidata.org.
  12. [16] . The London Gazette 41589. wikidata.org.
  13. [17] . wikidata.org.
  14. [18] . ieee-uffc.org. ieee-uffc.org. Provenance: wikidata.org.
  15. [13] . wikidata.org.
  16. [22] . wikidata.org.
  17. [19] . wikidata.org.
  18. [23] . Retrieved . wikidata.org.
  19. [24] . Retrieved . wikidata.org.
  20. [3] . wikidata.org.
  21. [5] . wikidata.org.
  22. [25] . wikidata.org.
  23. [26] . wikidata.org.
  24. [14] . wikidata.org.
  25. [27] . wikidata.org.

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site
  12. [39] . Wikidata. wikidata.org. → on this site
  13. [40] . Wikidata. wikidata.org. → on this site
  14. [41] . Wikidata. wikidata.org. → on this site
  15. [42] . Wikidata. wikidata.org. → on this site
  16. [43] . Wikidata. wikidata.org. → on this site
  17. [44] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [9] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [45] . Wikidata sitelinks. wikidata.org.
  3. [46] . 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). Louis Essen. Retrieved April 10, 2026, from https://4ort.xyz/entity/louis-essen
MLA “Louis Essen.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/louis-essen.
BibTeX @misc{4ortxyz_louis-essen_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Louis Essen}}, year = {2026}, url = {https://4ort.xyz/entity/louis-essen}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Louis Essen — https://4ort.xyz/entity/louis-essen (retrieved 2026-04-10)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 2d ago · Epìdosis · 2026-05-21 view diff on Wikidata ↗
    Award received
    Place of death Great Bookham
    Notable work
    Doctoral advisor David William Dye
    + 20 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/32149|batch #32149]]: import P21 and P106 from GND (33)"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.