Leo Graetz

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Leo Graetz
Leo Graetz.jpg
Leo Graetz, painted by Franz von Stuck (1906)
Born(1856-09-26)26 September 1856
Died12 November 1941(1941-11-12) (aged 85)
Known forGraetz number, Diode bridge

Leo Graetz (26 September 1856 – 12 November 1941) was a German physicist. He was born in Breslau, Germany, and was the son of historian Heinrich Graetz.

Graetz was one of the first to investigate the propagation of electromagnetic energy. The Graetz number (Gz), a dimensionless number describing heat flow, is named after him.[1] Also sometimes known by his name is the diode bridge rectifier circuit that was invented by Polish electrotechnician Karol Pollak in 1896[2] and that was independently invented and published by Leo Graetz in 1897.[3]

In 1880 he confirmed the Stefan–Boltzmann law.[4]

Graetz died in Munich at age 85.

Publications[edit]

References[edit]

  1. ^ See:
    • Graetz, L. (1883). "Über die Wärmeleitungsfähigkeit von Flüssigkeiten" [On the heat conductivity of fluids]. Annalen der Physik und Chemie. 3rd series (in German). 18 (1): 79–94.
    • Graetz, L. (1885). "Über die Wärmeleitungsfähigkeit von Flüssigkeiten [Part 2]" [On the heat conductivity of fluids]. Annalen der Physik und Chemie. 3rd series (in German). 25 (7): 337–357.
  2. ^ That Karol ("Charles") Pollak had invented a diode bridge prior to Leo Graetz is mentioned in:
  3. ^ See:
  4. ^ Graetz, L. (1880). "Über das Gesetz der Wärmestrahlung und das absolute Emisssionsvermögen des Glases" [On the law of heat radiation and the absolute emissive power of glass]. Annalen der Physik und Chemie. 3rd series (in German). 11: 913–930.