Doppler Effect

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

• low pitched

• high pitched

• normal

Tags

NGSS.HS-PS4-1

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

• low pitched

• high pitched

• normal

Tags

NGSS.HS-PS4-1

When an automobile is at rest next to the listener, the sound of its horn seems relatively:

• low pitched

• high pitched

• normal

Tags

NGSS.HS-PS4-1

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

• wave speed

• wave amplitude

• wave frequency

Tags

NGSS.HS-PS4-1

Which of the following scenarios would produce the Doppler Effect (aka a shift in pitch)? Check all that apply.

• A moving sound source and a stationary observer (such as an airplane passing overhead)

• A moving observer and a stationary source (such as a person running past a loud stereo)

• A moving source and moving observer (such as kids chasing an ice cream truck that is playing music)

• A non-moving source and non-moving observer (such as person watching television on a couch)

Tags

NGSS.HS-PS4-1

What is the Doppler effect?

• The observed change in frequency of sound or light because of the relative motion of a wave source and the observer.

• The observed change in amplitude of sound or light because of the relative motion of a wave source and the observer.

• The observed change in wave speed of sound or light because of the relative motion of a wave source and the observer.

• The observed change in equilibrium position of sound or light because of the relative motion of a wave source and the observer.

Tags

NGSS.HS-PS4-1