Doppler Effect

If you are standing in front of this car, the wavelengths nearest you would have a _______ frequency

• quieter

• louder

• higher

• lower

Tags

NGSS.HS-PS4-1

Which person will hear a lower pitched sound from the police car and why?

• Person A, because the wavelengths are squished shorter as the car approaches

• Person A, because the wavelengths are stretched longer as the car approaches

• Person B, because the wavelengths are squished shorter as the car approaches

• Person B, because the wavelengths are stretched longer as the car approaches

Tags

NGSS.HS-PS4-1

What can you tell about the motion of this object?

• Moving left.
• Moving right quickly.
• Standing still. 
• Moving up slowly. 

Tags

NGSS.HS-PS2-1

What can you tell about this object's motion?

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

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

What happens to the wavelength and frequency of a wave as an object moves TOWARDS us?

• Wavelength = decreases

  Frequency = increases

• Wavelength = increases

  Frequency = increases

• Wavelength = increases

  Frequency = decreases

• Wavelength = decreases

  Frequency = decreases

Tags

NGSS.HS-PS4-1

What happens to the wavelength and frequency of a wave as an object moves AWAY from us?

• Wavelength = decreases

  Frequency = increases

• Wavelength = increases

  Frequency = increases

• Wavelength = increases

  Frequency = decreases

• Wavelength = decreases

  Frequency = decreases

Tags

NGSS.HS-PS4-1

When the car moves AWAY from you, its horn seems...

• Low pitched
• High pitched
• Normal

Tags

NGSS.HS-PS4-1

If a star is being observed from Earth and it's light has shifted towards the blue side of the electromagnetic spectrum it would be...

• Moving towards the Earth
• Moving away from the Earth
• This is a trick question that cannot be answered
• It isn't a star, it is a very large blueberry.

If a star is being observed from Earth and it's light has shifted towards the red side of the electromagnetic spectrum it would be...

• Moving towards the Earth
• Moving away from the Earth
• This is a trick question that cannot be answered
• It isn't a star, it is a very large blueberry.

Tags

NGSS.HS-ESS1-2