Principle
If an emitter of sound or a detector is set into motion relative
to the medium of propagation, the frequency of the waves that are
emitted or detected is shifted due to the Doppler effect.
Benefits
- Easy frequency setting thanks to digital function generator
- Intuitive measuring instrument
- Results well reproducible because of the motor-driven car
Tasks
- Measure the Doppler shift for varying frequencies and
velocities for a moving sound emitter. Compare the measurements
with the values predicted by theory and validate equation (4).
- Measure the Doppler shift for varying frequencies and
velocities for a moving detector. Compare the measurements with the
values predicted by theory and validate equation (6).
What you can learn about
- Wave propagation
- Doppler shift of frequency
