= Johannes Rydberg
{c}
{tag=Physicist}
{title2=1854–1919}
{wiki}
= Johannes Robert Rydberg
{c}
{synonym}
= Janne Rydberg
{c}
{synonym}
<Johannes Rydberg> organized atomic <spectral lines> into series using <wavenumbers>. In modern notation, a typical series has the form $\tilde\nu_n=\tilde\nu_\infty-R/(n+\delta)^2$, with successive <integers> $n$ and a fitted offset $\delta$. The relation predicts a limiting <wavenumber> and increasingly close spacing of <spectral lines>. His empirical comparisons across <chemical elements> preceded the later explanation through transitions between quantized atomic <energy levels>, illustrating how precise regularities can guide a physical theory.<On the Structure of the Line-Spectra of the Chemical Elements by Johannes Rydberg>[pp. 331–337: use of wavenumbers, series formula and comparisons]{ref}
Physicist.https://sok.riksarkivet.se/sbl/Presentation.aspx?forceOrdinarySite=true&id=6266[Independent professional profile]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Rydberg%2C%20Janne%20%28foto%20Per%20Bagge%3B%20AFs%20Arkiv%29.jpg?width=250]
{title=Portrait of <Johannes Rydberg>}
{description=Per Bagge; Archives and Museum of the Academic Society in Lund (AFs Arkiv & Studentmuseum), via Wikimedia Commons. Public domain in the source country and jurisdictions using life plus 70 years or less, per Commons PD-old-70; Public Domain Mark. No separate U.S. determination added. https://creativecommons.org/publicdomain/mark/1.0/[Source usage terms], via Wikimedia Commons.}
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{width=250}
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