Definition of the Doppler effect noun from the Oxford Advanced Learner's Dictionary


the Doppler effect

BrE BrE//ˈdɒplər ɪfekt//
; NAmE NAmE//ˈdɑːplər ɪfekt//
[singular] (physics)
jump to other results
the way that sound waves, light waves, etc. change according to the direction that the source is moving in with relation to the person who is observing
See the Oxford Advanced American Dictionary entry: the Doppler effect