femtosecond

one quadrillionth of a second
Intangible unit_of_time Q1777507
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femtosecond

Summary

femtosecond is an unit of time[1]. femtosecond draws 145 Wikipedia views per month (unit_of_time category, ranking #36 of 82).[2]

Key Facts

  • femtosecond's instance of is recorded as unit of time[3].
  • femtosecond's instance of is recorded as SI derived unit[4].
  • femtosecond's measured physical quantity is recorded as duration[5].
  • femtosecond's Freebase ID is recorded as /m/0kbjz[6].
  • femtosecond's OmegaWiki Defined Meaning is recorded as 380703[7].
  • femtosecond's conversion to SI unit is recorded as {'unit': 'Q11574', 'amount': '+0.000000000000001'}[8].
  • femtosecond's wurvoc.org measure ID is recorded as femtosecond-time[9].
  • femtosecond's Quora topic ID is recorded as Femtosecond[10].
  • femtosecond's Zhihu topic ID is recorded as 20002334[11].
  • femtosecond's Wikidata SPARQL query equivalent is recorded as wd:Q1777507 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)[12].
  • femtosecond's Great Norwegian Encyclopedia ID is recorded as femtosekund[13].
  • femtosecond's unit symbol is recorded as {'lang': 'en', 'text': 'fs'}[14].
  • femtosecond's unit symbol is recorded as {'lang': 'ru', 'text': 'фс'}[15].
  • femtosecond's unit symbol is recorded as {'lang': 'es', 'text': 'fs'}[16].
  • femtosecond's unit symbol is recorded as {'lang': 'ca', 'text': 'fs'}[17].
  • femtosecond's unit symbol is recorded as {'lang': 'lb', 'text': 'fs'}[18].
  • femtosecond's Microsoft Academic ID is recorded as 167735695[19].
  • femtosecond's Wolfram Language unit code is recorded as "Femtoseconds"[20].
  • femtosecond's UCUM code is recorded as fs[21].
  • femtosecond's Ontology of units of Measure 2.0 unit ID is recorded as femtosecond-Time[22].
  • femtosecond's OpenAlex ID is recorded as C167735695[23].
  • femtosecond's ScienceDirect topic ID is recorded as engineering/femtosecond[24].

Body

Works and Contributions

Things named for femtosecond include femtochemistry[25], a branch of chemistry[26].

Why It Matters

femtosecond draws 145 Wikipedia views per month (unit_of_time category, ranking #36 of 82).[2] femtosecond has Wikipedia articles in 16 language editions, a strong signal of global cultural recognition.[27] femtosecond is known by 17 alternative names across languages and contexts.[28]

Entities named for femtosecond include femtochemistry[25], a branch of chemistry[26].

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] . Freebase Data Dumps. wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . Quora. wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . Logopedia. wikidata.org.
  13. [15] . wikidata.org.
  14. [16] . wikidata.org.
  15. [17] . wikidata.org.
  16. [18] . wikidata.org.
  17. [19] . wikidata.org.
  18. [20] . wikidata.org.
  19. [21] . wikidata.org.
  20. [22] . wikidata.org.
  21. [23] . OpenAlex. Retrieved . docs.openalex.org. Provenance: wikidata.org.
  22. [24] . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [25] . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [26] . Wikidata. wikidata.org. → on this site

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [27] . Wikidata sitelinks. wikidata.org.
  3. [28] . 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). femtosecond. Retrieved May 3, 2026, from https://4ort.xyz/entity/femtosecond
MLA “femtosecond.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/femtosecond.
BibTeX @misc{4ortxyz_femtosecond_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{femtosecond}}, year = {2026}, url = {https://4ort.xyz/entity/femtosecond}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): femtosecond — https://4ort.xyz/entity/femtosecond (retrieved 2026-05-03)

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