1. (

• hertz ,
• Hz ,
• cycle_per_second ,
• cycles/second ,
• cps ,
• cycle ,

) the unit of frequency; one hertz has a periodic interval of one second (named for Heinrich Rudolph Hertz) ;

2. (

• Hertz ,
• Heinrich_Hertz ,
• Heinrich_Rudolph_Hertz

) German physicist who was the first to produce electromagnetic waves artificially (1857-1894) ;

3. (

• Hertz ,
• Gustav_Hertz ,
• Gustav_Ludwig_Hertz

) German physicist who with James Franck proved the existence of the stationary energy states postulated by Bohr (1887-1975) ;