Leo Graetz
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. Also sometimes known by his name is the diode bridge rectifier circuit that was invented by Polish electrotechnician Karol Pollak in 1896 and that was independently invented and published by Leo Graetz in 1897.

In 1880 he confirmed the Stefan–Boltzmann law. 

Graetz died in Munich at age 85.
Q183
German
LOC
Q169470
physicist
Concept
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Breslau
LOC
Q63762
Heinrich Graetz
PER
Q12969754
electromagnetic energy
Concept
Q903886
Graetz number
Concept
Q126818
dimensionless number
Concept
Q179635
heat flow
Concept
Q1146554
diode bridge
Concept
Q11736256
Karol Pollak
PER
Q704747
Stefan–Boltzmann law
Concept
Q1726
Munich
LOC
Q66183
Leo Graetz
PER
Q66183
Leo Graetz
PER
1856-09-26T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
26 September 1856
DATE
1941-11-12T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
12 November 1941
DATE
1896-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1896
DATE
1897-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1897
DATE
1880-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1880
DATE
+85^^http://www.w3.org/2001/XMLSchema#decimal
85
NUMBER
residence
occupation
date of birth
date of death
place of birth
place of death
discoverer or inventor