Speed of light

Quality:

Speed of light in vacuum - speed of electromagnetic waves in vacuum. Article “Speed of light” in Simple English Wikipedia has 36.2 points for quality (as of July 1, 2026). The article contains 13 references and 9 sections. The article also contains templates indicating quality issues, therefore its score was reduced by 1.91 points.

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

Achievements in all the time:

Simple English Wikipedia:

sim

The 2204^th most popular in Simple English Wikipedia.

sim

The 1355^th most editable in Simple English Wikipedia.

Global Wikipedia:

The 1083^rd most popular in all topics.

The 1255^th most popular in AI.

Achievements in the last month:

Simple English Wikipedia:

sim

The 4133^rd most popular in Simple English Wikipedia in the last month.

Global Wikipedia:

The 6957^th most popular in all topics in the last month.

The 8188^th most popular in AI in the last month.

Since the creation of article “Speed of light”, its content was written by 72 registered users of Simple English Wikipedia (1355^th place) and edited by 5977 registered Wikipedia users in all languages (1255^th place).

The article is cited 145 times in Simple English Wikipedia and cited 17301 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Simple English): #47 in December 2004
• Global: #63 in May 2003

The highest popularity rank from 2008:

• Local (Simple English): #255 in April 2014
• Global: #84 in December 2016

There are 54 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	Vietnamese (vi) Tốc độ ánh sáng		96.2272
2	Ukrainian (uk) Швидкість світла		95.5556
3	Indonesian (id) Laju cahaya		94.81
4	Chinese (zh) 光速		94.7398
5	French (fr) Vitesse de la lumière		94.2237
6	English (en) Speed of light		92.9298
7	Turkish (tr) Işık hızı		87.3481
8	Japanese (ja) 光速		82.3153
9	Bulgarian (bg) Скорост на светлината		61.9102
10	Korean (ko) 빛의 속력		60.4069

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

#	Language	Popularity award	Relative popularity
1	English (en) Speed of light		29 536 823
2	Spanish (es) Velocidad de la luz		10 075 777
3	German (de) Lichtgeschwindigkeit		7 986 140
4	Russian (ru) Скорость света		6 164 489
5	French (fr) Vitesse de la lumière		4 432 434
6	Japanese (ja) 光速		4 109 367
7	Portuguese (pt) Velocidade da luz		3 271 728
8	Italian (it) Velocità della luce		3 059 602
9	Polish (pl) Prędkość światła		2 922 520
10	Arabic (ar) سرعة الضوء		1 775 042

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) Speed of light		61 081
2	Russian (ru) Скорость света		12 468
3	German (de) Lichtgeschwindigkeit		10 700
4	French (fr) Vitesse de la lumière		6 355
5	Japanese (ja) 光速		5 524
6	Spanish (es) Velocidad de la luz		5 075
7	Italian (it) Velocità della luce		3 246
8	Chinese (zh) 光速		2 828
9	Polish (pl) Prędkość światła		2 156
10	Portuguese (pt) Velocidade da luz		1 827

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

#	Language	AI award	Relative AI
1	English (en) Speed of light		1 509
2	German (de) Lichtgeschwindigkeit		638
3	French (fr) Vitesse de la lumière		375
4	Spanish (es) Velocidad de la luz		275
5	Italian (it) Velocità della luce		239
6	Russian (ru) Скорость света		238
7	Dutch (nl) Lichtsnelheid		194
8	Hebrew (he) מהירות האור		155
9	Japanese (ja) 光速		134
10	Turkish (tr) Işık hızı		128

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) Speed of light		3
2	French (fr) Vitesse de la lumière		2
3	Czech (cs) Rychlost světla		1
4	German (de) Lichtgeschwindigkeit		1
5	Esperanto (eo) Lumrapido		1
6	Basque (eu) Argiaren abiadura		1
7	Persian (fa) سرعت نور		1
8	Hungarian (hu) Fénysebesség		1
9	Armenian (hy) Լույսի արագություն		1
10	Indonesian (id) Laju cahaya		1

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 Simple English Wikipedia the most popular articles on that day were: List of European countries, Black, List of sex positions, 2026 Iran war, Suresh Raina, Politics of Germany, Academy Award for Best Director, 2020, DYSS-TV, 2022.

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