Doppler Effect Worksheet



Doppler Effect Worksheet Name:_______________________

Read these resources and answer questions:







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

a. Low pitched (low frequency) b. High Pitched (high frequency)

c. Normal (no change in frequency)

2. When the automobile moves away from the listener, its horn seems

a. Low pitched (low frequency) b. High Pitched (high frequency)

c. Normal (no change in frequency)

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

a. Wave speed b. wave frequency

4. True / False: If the object stays still, but the observer moves, the Doppler effect is still observed.

5. True / False: A moving wave source does not affect the frequency of the wave encountered by the observer.

6. True / False: A higher frequency results when a wave source moves towards an observer.

7. Two fire trucks with sirens on speed towards and away from an observer as shown below.

A) Which truck produces a higher than normal siren frequency?

B) Which truck produces a lower than normal siren frequency?

8. List the colors of the visible light spectrum in order of lowest to highest frequency.

9. When galaxies move away from us they appear to have a “red shift” in color. Explain why this happens.

10. What color do galaxies appear if they are moving towards us?

11. What 2 other real world applications of the Doppler effect?

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A

B

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