Assertion: doppler effect | /r/HasProperty | proposed by christian andreas doppler
Facets:
value: in 1842
type: TEMPORAL
Source sentences:
text: The Doppler Effect was proposed by Christian Andreas Doppler in 1842, and states that the frequency of a wave, perceived by an observer, varies with the motion of the source of the wave relative to the observer.
text: The Doppler effect was first proposed by Christian Andreas Doppler, the man it is named after (pictured left).