[keerkh-hawf] 
Gus⋅tav Ro⋅bert [goo s-tahf roh-bert] , 1824–87, German physicist. |
| Kirchhoff (kîr'kôf') Pronunciation Key
German chemist who with Robert Bunsen discovered the elements cesium and rubidium. He also investigated the solar spectrum and researched electrical circuits and the flow of currents. His electromagnetic theory of diffraction is still the most commonly used in optics. |