DOPPLER EFFECT


Meaning of DOPPLER EFFECT in English

[Doppler effect] n [Christian J. Doppler] (1905): a change in the frequency with which waves (as sound or light) from a given source reach an observer when the source and the observer are in motion with respect to each other so that the frequency increases or decreases according to the speed at which the distance is decreasing or increasing

Merriam-Webster English vocab.      Английский словарь Merriam Webster.