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 86.6 points for quality (as of July 1, 2026). 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 7952^nd most popular in all topics.

In June 2026 the article “Refractive index” was edited by 3 authors in English Wikipedia and written by 7 authors in all languages.

Since the creation of article “Refractive index”, its content was written by 442 registered users of English Wikipedia and edited by 1969 registered Wikipedia users in all languages.

The article is cited 3142 times in English Wikipedia and cited 36705 times in all languages (4603^rd place).

The highest Authors Interest rank from 2001:

• Local (English): #2064 in June 2002
• Global: #1181 in December 2010

The highest popularity rank from 2008:

• Local (English): #3718 in November 2014
• Global: #4055 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, 2026 (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		98.6337
2	Catalan (ca) Índex de refracció		93.666
3	English (en) Refractive index		86.5636
4	Ukrainian (uk) Показник заломлення		83.5389
5	German (de) Brechungsindex		66.6076
6	Tamil (ta) ஒளிவிலகல் குறிப்பெண்		59.9289
7	Croatian (hr) Indeks loma		57.8124
8	French (fr) Indice de réfraction		56.8865
9	Spanish (es) Índice de refracción		56.8156
10	Chinese (zh) 折射率		51.573

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

#	Language	Popularity award	Relative popularity
1	English (en) Refractive index		13 266 103
2	Spanish (es) Índice de refracción		3 224 077
3	German (de) Brechungsindex		3 111 110
4	Russian (ru) Показатель преломления		1 911 668
5	Japanese (ja) 屈折率		1 661 750
6	French (fr) Indice de réfraction		1 563 612
7	Polish (pl) Współczynnik załamania		1 040 825
8	Chinese (zh) 折射率		974 374
9	Italian (it) Indice di rifrazione		890 639
10	Dutch (nl) Brekingsindex		458 758

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		15 495
2	German (de) Brechungsindex		3 624
3	Russian (ru) Показатель преломления		1 980
4	French (fr) Indice de réfraction		1 916
5	Japanese (ja) 屈折率		1 511
6	Spanish (es) Índice de refracción		1 227
7	Chinese (zh) 折射率		1 096
8	Italian (it) Indice di rifrazione		773
9	Polish (pl) Współczynnik załamania		736
10	Dutch (nl) Brekingsindex		442

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		442
2	German (de) Brechungsindex		262
3	French (fr) Indice de réfraction		172
4	Russian (ru) Показатель преломления		87
5	Dutch (nl) Brekingsindex		80
6	Spanish (es) Índice de refracción		76
7	Italian (it) Indice di rifrazione		73
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		3
2	German (de) Brechungsindex		1
3	Persian (fa) ضریب شکست		1
4	Hungarian (hu) Törésmutató		1
5	Chinese (zh) 折射率		1
6	Arabic (ar) معامل الانكسار		0
7	Azerbaijani (az) İşığın tam daxili qayıtması		0
8	Belarusian (be) Паказчык пераламлення		0
9	Bulgarian (bg) Показател на пречупване		0
10	Catalan (ca) Índex de refracció		0

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

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

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 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information