Robert Strutt, 4th Baron Rayleigh

The Lord Rayleigh
Rayleigh in 1934
Born(1875-08-28)28 August 1875
Essex, England
Died13 December 1947(1947-12-13) (aged 72)
EducationEton College
Alma materTrinity College, Cambridge
Known forRayleigh
Rayleigh scattering
Spouses
Lady Mary Hilda Clements
(m. 1905; died 1919)
Kathleen Alice Coppin-Straker
(m. 1920)
Children6
AwardsBakerian Medal (1911, 1919)
FRS (1905)
Scientific career
FieldsExperimental physics
Chemical physics
InstitutionsImperial College London

Robert John Strutt, 4th Baron Rayleigh FRS (28 August 1875 – 13 December 1947) was a British peer and physicist. He discovered "active nitrogen" and was the first to distinguish the glow of the night sky.