Doppler Effect Quiz

When an automobile moves towards a listener, the sound of its horn seems relatively:

• Low pitched

• High Pitched

• Normal

When the automobile moves away from the listener, its horn seems:

• Low pitched

• High Pitched

• Normal

The changed pitch of the Doppler effect is due to changes in:

• Wave speed

• Wave frequency

Circle the letter of each statement about the Doppler Effect that is true:

• It occurs when a wave source moves towards an observer

• It occurs when an observer moves towards a wave source

• It occurs when a wave source moves away from an observer

• It occurs when an observer moves away a wave source

A moving wave source does not affect the frequency of the wave encountered by the observer.

• True

• False

A higher frequency results when a wave source moves towards an observer.

• True

• False

Which truck produces a higher than normal siren frequency?

Which truck produces a lower than normal siren frequency?