Source: wikibot/rydberg-ritz-combination-principle
= Rydberg–Ritz combination principle
{wiki=Rydberg–Ritz_combination_principle}
The Rydberg–Ritz combination principle is a concept in the field of spectroscopy that relates to the spectral lines of atoms, particularly hydrogen. It was formulated in the early 20th century based on the work of physicists Johannes Rydberg and Walther Ritz.