EntityQ66885· pop 16· linked from 21 articlesOtto LummerSign in to saveGerman physicist (1860–1925)ConnectionsWrocławEntityphysicsEntityMax PlanckEntityopticsEntityWeimar RepublicEntityGeraEntityInternet ArchiveEntityHermann von HelmholtzEntityGerman ConfederationEntitythermal radiationEntityPlanck's lawEntityblack-body radiationEntitymercury-vapor lampEntityPrincipality of Reuss-GeraEntityhistory of quantum mechanicsEntityHedwig KohnEntitydoctoral advisorEntityErnst GehrckeEntityCategories1860 births1925 deaths19th-century German physicists20th-century German physicistsPeople from GeraPeople from the Principality of Reuss-Gera