refractive index

ratio of the speed of light in vacuum to that in the medium
Thing general Q174102
refractive index
Oleg Alexandrov · Public Domain · Wikimedia
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refractive index

Summary

refractive index ranks in the top 1% of general entities by monthly Wikipedia readership (2,344 views/month).[1]

Key Facts

  • refractive index is a type of physical quantity[2].
  • refractive index is a type of dimensionless quantity[3].
  • refractive index is a type of index number[4].
  • refractive index's Commons category is recorded as Refraction[5].
  • refractive index's quantity symbol is recorded as n[6].
  • refractive index's described by source is recorded as ISO 80000-7:2008 Quantities and units—Part 7: Light[7].
  • refractive index's described by source is recorded as ISO 80000-7:2019 Quantities and units — Part 7: Light and radiation[8].
  • refractive index's described by source is recorded as Meyers Konversations-Lexikon, 4th edition (1885–1890)[9].
  • refractive index's main Wikidata property is recorded as P1109[10].
  • refractive index's different from is recorded as complex refractive index[11].
  • refractive index's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4[12].
  • refractive index's maintained by WikiProject is recorded as WikiProject Mathematics[13].
  • refractive index's recommended unit of measurement is recorded as 1[14].
  • refractive index's P14541 is recorded as 3doce7[15].

Body

Definition and Type

Recorded subclass of include physical quantity[2], dimensionless quantity[3], and index number[4].

Why It Matters

refractive index ranks in the top 1% of general entities by monthly Wikipedia readership (2,344 views/month).[1] It has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[16] It is known by 73 alternative names across languages and contexts.[17]

References

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

Direct Wikidata claims

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

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [16] ↑ . Wikidata sitelinks. wikidata.org.
  3. [17] ↑ . 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). refractive index. Retrieved October 4, 2026, from https://4ort.xyz/entity/refractive-index
MLA “refractive index.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/refractive-index.
BibTeX @misc{4ortxyz_refractive-index_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{refractive index}}, year = {2026}, url = {https://4ort.xyz/entity/refractive-index}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): refractive index — https://4ort.xyz/entity/refractive-index (retrieved 2026-10-04)

Canonical URL: https://4ort.xyz/entity/refractive-index · Last refreshed:

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. 24d ago · عُثمان · 2026-09-10 view diff on Wikidata ↗
    Iev number → 845-24-109, 212-18-34
    "/* wbsetclaim-create:1||1 */ [[Property:P8855]]: 212-18-34, Matched to [[:toollabs:mix-n-match/#/entry/102057445|refractive index (#102057445)]] in [[:toollabs:mix-n-match/#/catalog/3984|IEC 60050]] #"
  2. 12w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 3doce7
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  3. 19w ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Recommended unit of measurement → 1
    Main wikidata property → P1109
    Maintained by wikiproject → WikiProject Mathematics
    On focus list of wikimedia project → Wikipedia:Vital articles/Level/4
    + 7 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|2 */ [[Property:P8189]]: 987007529453605171, mv to monolingual text names on J9U statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.