Leo Graetz

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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.

Leo Graetz
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

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

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References

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  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.