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Hertz, Heinrich Rudolf

(Encyclopedia)Hertz, Heinrich Rudolf hĕrts [key], 1857–94, German physicist. He confirmed J. C. Maxwell's electromagnetic theory and in the course of experiments (1886–89) produced and studied electromagnetic...

hertz

(Encyclopedia)hertz hûrts [key] [for Heinrich R. Hertz], abbr. Hz, unit of frequency, equal to 1 cycle per second. The term is combined with metric prefixes to denote multiple units such as the kilohertz (1,000 Hz...

Hertz, Gustav

(Encyclopedia)Hertz, Gustav go͝osˈtäf hĕrts [key], 1887–1975, German physicist. He is noted for his work on the atom, and he shared with James Franck the 1925 Nobel Prize in Physics for research (1914) on the...

Rudolf I

(Encyclopedia)Rudolf I or Rudolf of Hapsburg ro͞oˈdŏlf [key], 1218–91, German king (1273–91), first king of the Hapsburg dynasty. Rudolf's election as king ended the interregnum (1250–73), during which tim...

Rudolf

(Encyclopedia)Rudolf, 1858–89, Austrian archduke, crown prince of Austria and Hungary; only son of Emperor Francis Joseph and Empress Elizabeth. Upon his mysterious death at Mayerling near Vienna (officially decl...

Rudolf II

(Encyclopedia)Rudolf II, 1552–1612, Holy Roman emperor (1576–1612), king of Bohemia (1575–1611) and of Hungary (1572–1608), son and successor of Holy Roman Emperor Maximilian II. Acceding to the Hapsburg la...

Friml, Rudolf

(Encyclopedia)Friml, Rudolf (Charles Rudolf Friml) frĭmˈəl [key], 1879–1972, American composer, b. Prague. Friml lived in the United States after 1906. The best-known of his 33 light operas are The Firefly (19...

Virchow, Rudolf

(Encyclopedia)Virchow, Rudolf ro͞oˈdôlf fĭrˈkhō [key], 1821–1902, German pathologist, a founder of cellular pathology. He became professor at the Univ. of Würzburg (1849) and professor and director of the ...

Bing, Rudolf

(Encyclopedia)Bing, Rudolf ro͞oˈdŏlf bĭng [key], 1902–97, Austrian operatic manager. Naturalized a British subject in 1946, he was general manager of the Glyndebourne operatic festivals (1934–49) and artist...

Steiner, Rudolf

(Encyclopedia)Steiner, Rudolf ro͞oˈdôlf shtīnˈər [key], 1861–1925, German occultist and social philosopher. He was a leader in the founding of the German Theosophic Association (see theosophy). In time he a...