What is another word for Christian Johann Doppler?
Pronunciation: [kɹˈɪst͡ʃən d͡ʒˈə͡ʊhan dˈɒplə] (IPA) 
Christian Johann Doppler was a renowned Austrian physicist who is best known for his discovery of the Doppler effect. This phenomenon occurs when there is a change in the frequency and wavelength of a wave due to the relative motion between the source of the wave and the observer. Doppler's work also extended to the study of sound waves and the measurement of the speed of light. Synonyms for Doppler's name include "Doppler", "Johann Doppler", and "C. J. Doppler". He is considered to be one of the most influential scientists of the 19th century and his name is still synonymous with the Doppler effect to this day.
