Doppler Effect Flashcards
1
Q
Doppler Effect
A
The perceived change in frequency of the sound detected by a listener due to relative motion between the sound source and the listener relative to the medium of sound propagation
2
Q
Source moves towards listener
A
Vs: negative
Vl: zero
3
Q
Source moves away from listener
A
Vs: positive
Vl: zero
4
Q
Listener moves towards source
A
Vs: zero
Vl: positive
5
Q
Listener moves away from source
A
Vs: zero
Vl: negative
6
Q
Applications of Doppler
A
Measure blood flow rate and direction
Ultrasounds for pregnancy
In speed traps
In astronomy: universe is expanding
