hertz (Hz) The derived unit of frequency in the SI system of units. One hertz is a frequency of one cycle per second. 1000 Hz = 1 kilohertz (kHz); 1000 000 Hz = 1 megahertz (MHz). The unit is named after the German physicist Heinrich Hertz (1857-1894,) who demonstrated the existence of radio waves in 1886. Related categories UNITS WAVES AND WAVE PHENOMENA Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |