ALL meanings of doppler effect
Dop·pler ef·fect
D d - noun doppler effect (often lowercase) the shift in frequency (Doppler shift) of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as perceived by the observer: the shift is to higher frequencies when the source approaches and to lower frequencies when it recedes. 1
- noun doppler effect a phenomenon, observed for sound waves and electromagnetic radiation, characterized by a change in the apparent frequency of a wave as a result of relative motion between the observer and the source 0
- noun doppler effect the apparent change of frequency of sound waves or light waves, varying with the relative velocity of the source and the observer: if the source and observer are drawing closer together, the observed frequency is higher than the emitted frequency 0
- noun doppler effect The apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves. 0