Tito_Speri
Tito Speri (2 August 1825 - 3 March 1853) was an Italian patriot and hero of the Risorgimento.
Tito Speri (2 August 1825 - 3 March 1853) was an Italian patriot and hero of the Risorgimento.
Christian Andreas Doppler ( ; 29 November 1803 – 17 March 1853) was an Austrian mathematician and physicist. He formulated the principle – now known as the Doppler effect – that the observed frequency of a wave depends on the relative speed of the source and the observer.