Refractive index

Quality:

Refractive index - ratio of the speed of light in vacuum to that in the medium. Article "Refractive index" in English Wikipedia has 86.9 points for quality (as of July 1, 2025). The article contains 102 references and 36 sections.

This article has the best quality in Russian Wikipedia. However, this article is the most popular in English version.

Achievements in all the time:

Global Wikipedia:

The 7628^th most popular in all topics.

In June 2025 the article "Refractive index" was edited by 4 authors in English Wikipedia and written by 4 authors in all languages.

Since the creation of article "Refractive index", its content was written by 429 registered users of English Wikipedia and edited by 1955 registered Wikipedia users in all languages.

The article is cited 3008 times in English Wikipedia (9934^th place) and cited 34548 times in all languages (4731^st place).

The highest Authors Interest rank from 2001:

• Local (English): #2068 in June 2002
• Global: #1180 in December 2010

The highest popularity rank from 2008:

• Local (English): #3700 in November 2014
• Global: #4044 in April 2015

There are 49 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Russian (ru) Показатель преломления		98.8069
2	Catalan (ca) Índex de refracció		93.5305
3	English (en) Refractive index		86.8799
4	Ukrainian (uk) Показник заломлення		85.7688
5	German (de) Brechungsindex		68.82
6	Tamil (ta) ஒளிவிலகல் குறிப்பெண்		60.3778
7	Croatian (hr) Indeks loma		57.8413
8	French (fr) Indice de réfraction		57.006
9	Spanish (es) Índice de refracción		52.4643
10	Chinese (zh) 折射率		51.3304

The following table shows the most popular language versions of the article.

#	Language	Popularity award	Relative popularity
1	English (en) Refractive index		13 003 164
2	Spanish (es) Índice de refracción		3 199 700
3	German (de) Brechungsindex		3 070 441
4	Russian (ru) Показатель преломления		1 720 453
5	Japanese (ja) 屈折率		1 636 664
6	French (fr) Indice de réfraction		1 525 621
7	Polish (pl) Współczynnik załamania		1 028 695
8	Chinese (zh) 折射率		954 013
9	Italian (it) Indice di rifrazione		876 829
10	Arabic (ar) معامل الانكسار		455 190

The following table shows the language versions of the article with the highest popularity in the last month.

#	Language	Popularity award	Relative popularity
1	English (en) Refractive index		25 948
2	German (de) Brechungsindex		4 278
3	Russian (ru) Показатель преломления		3 439
4	Japanese (ja) 屈折率		2 777
5	Spanish (es) Índice de refracción		2 576
6	French (fr) Indice de réfraction		2 567
7	Chinese (zh) 折射率		2 447
8	Italian (it) Indice di rifrazione		1 211
9	Polish (pl) Współczynnik załamania		969
10	Dutch (nl) Brekingsindex		721

The following table shows the language versions of the article with the highest Authors’ Interest.

#	Language	AI award	Relative AI
1	English (en) Refractive index		429
2	German (de) Brechungsindex		260
3	French (fr) Indice de réfraction		168
4	Russian (ru) Показатель преломления		86
5	Dutch (nl) Brekingsindex		80
6	Spanish (es) Índice de refracción		74
7	Italian (it) Indice di rifrazione		72
8	Japanese (ja) 屈折率		50
9	Chinese (zh) 折射率		49
10	Hebrew (he) מקדם שבירה		44

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

#	Language	AI award	Relative AI
1	English (en) Refractive index		4
2	Arabic (ar) معامل الانكسار		0
3	Azerbaijani (az) İşığın tam daxili qayıtması		0
4	Belarusian (be) Паказчык праламлення		0
5	Bulgarian (bg) Показател на пречупване		0
6	Catalan (ca) Índex de refracció		0
7	Czech (cs) Index lomu		0
8	Danish (da) Brydningsindeks		0
9	German (de) Brechungsindex		0
10	Greek (el) Δείκτης διάθλασης		0

The following table shows the language versions of the article with the highest number of citations.

On 12 August 2025 in multilingual Wikipedia, Internet users most often read articles on the following topics: Cristiano Ronaldo, Wednesday, Georgina Rodríguez, ChatGPT, Weapons, Jenna Ortega, deaths in 2025, Taylor Swift, Miguel Uribe Turbay, 2025–26 UEFA Champions League.

In English Wikipedia the most popular articles on that day were: Weapons (2025 film), Danielle Spencer (American actress), Cristiano Ronaldo, Deaths in 2025, Taylor Swift, Wednesday (TV series), Superman (2025 film), Georgina Rodríguez, Coolie (2025 film), The Fantastic Four: First Steps.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information