Lesson on Doppler Effect

As a person walks towards the speaker, the frequency he or she hears 

• decreases
• increases or decreases, depending on temperature
  
• Increase
• remains the same

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NGSS.HS-PS4-1

The source of a sound moves away from the listener. The listener has the impression that the source isuestion*

• lower in pitch
• higher in amplitude
•  lower in velocity 
• all above

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The Doppler effect is produced if 

• the detector is in motion. 
• the source is in motion. 
• both of these.
• none of the above.

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What sort of waves exhibit the Doppler effect? 

• Water wave.
• sound wave.
• light wave.
• None of the above.

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NGSS.HS-PS4-1

If an ambulance siren passes you it will get.

• Lower
• louder

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If a ambulance siren is coming to you it is getting

• Louder
• lower

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NGSS.MS-PS4-1

Which wave frequency is higher.

• The small part 
• The big part

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NGSS.HS-PS4-1

Which wave frequency is lower 

• Front of car 
• Back of car

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NGSS.HS-PS4-1

Which wavelength is smaller.

• Front of car
• Back of car

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NGSS.HS-PS4-1

Which wavelength is bigger. 

• front of car 
• Back of car

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NGSS.HS-PS4-1