411 REFERENCE · Wiktionary
Ritz's combination principle
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
From Walter Ritz, Swiss physicist.
Proper noun
en physics The observation that the sums and differences of the frequencies of spectral lines often equal other observed frequencies; a consequence of quantum mechanics.
en Rydberg-Ritz combination principle
en eponyms