🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsРусскийفارسی한국어中文日本語EntityQ590051· pop 23· linked from 184 articlesdispersion relationrelation of wavelength/wavenumber as a function of a wave's frequencyAvailable in 21 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoArmenianCatalanConnectionsphononEntityrefractive indexEntityCategoriesEquations of physicsWave mechanics