Give one application of the Doppler effect. - Leaving Cert Physics - Question (i) - 2007

One notable application of the Doppler effect is in medical ultrasound imaging. In this application, the Doppler effect is used to measure the speed of blood flow within vessels. As the ultrasound waves emitted by the device encounter moving red blood cells, the frequency of the reflected waves changes based on the speed and direction of the blood flow. This change in frequency allows for the assessment of various conditions, such as detecting blockages or abnormalities in blood circulation, ultimately aiding in diagnoses and treatment plans.