Geertruida de Haas-Lorentz

Berta de Haas-Lorentz
Miss G.L. Lorentz, before 1909, employed by the Polytechnische School Delft, Netherlands.
Born
Geertruida Luberta Lorentz

(1885-10-20)20 October 1885
Leiden, South Holland, Netherlands
Died2 January 1973(1973-01-02) (aged 87)
Leiden, South Holland, Netherlands
Alma materUniversity of Leiden
Known forFirst to perform fluctuational analysis of electrons as Brownian particles
Spouse
(m. 1910; died 1960)
Children4
Parents
Scientific career
FieldsPhysics
InstitutionsTechnical University of Delft
ThesisOver de theorie van de Brown'sche beweging en daarmede verwante verschijnselen (1912)
Doctoral advisorHendrik Lorentz

Geertruida Luberta "Berta" de Haas-Lorentz (20 November 1885 – 1973) was a Dutch physicist and a professor at the Technical University of Delft. She was the first to theoretically study thermal fluctuations in electric circuits, treating electrons as Brownian particles. Consequently she is considered one of the pioneers of electrical noise theory. She was the daughter and doctoral student of Hendrik Lorentz. She went by the name Berta, or Ber.