Which of these is often used to exemplify the Doppler effect?
Answer An ambulance's siren
The Doppler effect, named for physicist Christian Doppler, is the phenomenon in which the frequency of a sound wave changes depending on whether the source is moving towards or away from the person hearing it. This explains why the sound of a siren appears to raise and lower in pitch depending on whether it is moving towards or away from you.
Asked by Christina Loprieno · Last updated 5 years ago · 298.2K views · SOURCE
