OUTCOME
By the end of the lesson you will be able to recognise how a moving source of sound will result in the Doppler effect and be able to describe how Doppler effects are used in ultrasound
The Doppler effect results in wavefronts being compressed as a sound source moves toward the observer and the waves lengths being stretched as the source moves away from the observer
The speed of an object can be found using the change in frequency of a sound or light emitted from of bounced off an object
LEARNING TASKS
Explore
Build a model of the Doppler effect and the film the effect of a moving source
Elaborate
Activity: Use Winscope to measure the doppler shift of sound
Evaluate
Answer the questions form the text
Ex 9.3 Review
PDQs 1.4-1.6
Reading for next class: p. 356-360