Doppler Effect Test

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Email

Longer sound waves are...

• High Pitched
• Low pitched
• Medium Pitched

When these two things move towards each other, waves are compressed. What are the two things called? (pick all that apply)

• Person
• Source
• Car
• Observer
• Wave

In what direction are the sound waves being produced by the object (red dot) moving?

• Moving North (up)
• Moving West (left)
• Moving South (down)
• Moving East (right)

When a car moves further away from you, it's horn seems...

• Normal
• High Pitched
• Low Pitched

What is the Doppler Effect?

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

Based on the text above, what would happen to the frequency of the sound waves if you were inside of the car while it was moving?

• The frequency would increase as the car moves
• The frequency would stay the same as the car moves
• The frequency would increase then decrease as the car moves
• The frequency would decrease as the car moves