Johannes Rydberg

1854 - 1919

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Johannes (Janne) Robert Rydberg (Swedish: [ˈrŷːdbærj]; 8 November 1854 – 28 December 1919) was a Swedish physicist mainly known for devising the Rydberg formula, in 1888, which is used to describe the wavelengths of photons (of visible light and other electromagnetic radiation) emitted by changes in the energy level of an electron in a hydrogen atom. Read more on Wikipedia

Since 2007, the English Wikipedia page of Johannes Rydberg has received more than 106,683 page views. His biography is available in 42 different languages on Wikipedia (up from 40 in 2019). Johannes Rydberg is the 240th most popular physicist (down from 223rd in 2019), the 136th most popular biography from Sweden (down from 135th in 2019) and the 6th most popular Physicist.

Johannes Rydberg is most famous for his work on atomic spectra. He was the first to correctly explain the difference between the spectra of hydrogen and helium.

Memorability Metrics

  • 110k

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  • 61.39

    Historical Popularity Index (HPI)

  • 42

    Languages Editions (L)

  • 9.38

    Effective Languages (L*)

  • 2.58

    Coefficient of Variation (CV)

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Among physicists, Johannes Rydberg ranks 240 out of 717Before him are Burton Richter, Sheldon Lee Glashow, Claude-Louis Navier, David J. Thouless, Ettore Majorana, and Jagadish Chandra Bose. After him are David Bohm, Klaus Hasselmann, Julian Schwinger, Pierre-Gilles de Gennes, Gustaf Dalén, and Georg Bednorz.

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Among people born in 1854, Johannes Rydberg ranks 16Before him are Henri La Fontaine, Paul Sabatier, George Eastman, Milan I of Serbia, Georges Picquart, and Engelbert Humperdinck. After him are Paul Natorp, Duchess Marie of Mecklenburg-Schwerin, Paul von Rennenkampf, Moritz Moszkowski, Albert Edelfelt, and Prince Louis of Battenberg. Among people deceased in 1919, Johannes Rydberg ranks 25Before him are Grand Duke Paul Alexandrovich of Russia, Habibullah Khan, Ismail Qemali, L. Frank Baum, Madam C. J. Walker, and Kurt Eisner. After him are Prince John of the United Kingdom, Leonid Andreyev, Henry Gantt, Milan Rastislav Štefánik, Princess Marie Isabelle of Orléans, and Guido von List.

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In Sweden

Among people born in Sweden, Johannes Rydberg ranks 136 out of 1,612Before him are Gustav, Prince of Vasa (1799), Lennart Johansson (1929), Charles VII of Sweden (1130), Sigfrid Edström (1870), Halsten Stenkilsson (1050), and Ulf von Euler (1905). After him are Claes Oldenburg (1929), Magnus III of Sweden (1240), Catherine of Vadstena (1331), Emund the Old (1030), Nathan Söderblom (1866), and Ingegerd Olofsdotter of Sweden (1001).

Among PHYSICISTS In Sweden

Among physicists born in Sweden, Johannes Rydberg ranks 6Before him are Manne Siegbahn (1886), Anders Jonas Ångström (1814), Hannes Alfvén (1908), Kai Siegbahn (1918), and Rolf Maximilian Sievert (1896). After him are Gustaf Dalén (1869), Oskar Klein (1894), Christopher Polhem (1661), Knut Ångström (1857), Bert Bolin (1925), and Vagn Walfrid Ekman (1874).