Christian Doppler
Austrian mathematician and physicist
Died when: 49 years 108 days (591 months)Star Sign: Sagittarius

Christian Andreas Doppler (/'d?pl?r/ (German: ['d?pl?]); 29 November 1803 – 17 March 1853) was an Austrian mathematician and physicist. He is celebrated for his principle – known as the Doppler effect – that the observed frequency of a wave depends on the relative speed of the source and the observer.
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