Leonid Mandelstam
Leonid Isaakovich Mandelstam or Mandelshtam (Russian: Леонид Исаакович Мандельштам, IPA: [lʲɪɐˈnʲit ɨsɐˈakəvʲɪtɕ mənʲdʲɪlʲˈʂtam] ; 4 May 1879 – 27 November 1944) was a Soviet and Russian physicist. == Life == Leonid Mandelstam was born in Mogilev, in the Russian Empire (now in Belarus) into a Jewish family.