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
Press Enter · cited answer in seconds

refractive index

Summary

refractive index ranks in the top 1% of general entities by monthly Wikipedia readership (3,290 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].

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 (3,290 views/month).[1] It has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[15] It is known by 44 alternative names across languages and contexts.[16]

References

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

Direct Wikidata claims

  1. [2] . wikidata.org.
  2. [3] . ISO 80000-1:2009 Quantities and units—Part 1: General. 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] . ISO 80000-7:2019 Quantities and units — Part 7: Light and radiation. wikidata.org.

Aggregate / graph-position facts

  1. [1] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [15] . Wikidata sitelinks. wikidata.org.
  3. [16] . 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 April 11, 2026, from https://4ort.xyz/entity/refractive-index
MLA “refractive index.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Apr. 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: 2026-04-11}}
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 2026-04-11)

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. 5w 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.