Doppler Effect

Doppler Effect

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Multiple Choice

when the frequency is higher what happens to the wavelength?

• the wavelength gets longer

• The wavelength gets shorter

• the wavelength doesn't change

• I have no idea

Multiple Choice

High frequency waves have _________ wavelength.

• varying
• high
• the same
• low

Multiple Choice

Which wave in the diagram has the greatest wavelength?

• 1
• 2
• 3
• 4

Multiple Choice

Which wave has a greater frequency?

• A

• B

Multiple Choice

Which wave has a greater frequency?

• A

• B

Multiple Choice

When an ambulance move TOWARD you it sounds ________ pitched.

• high

• low

Multiple Choice

When an ambulance move TOWARD you it sounds ________ pitched.

• high

• low

Multiple Choice

The pitch of a sound wave relates to the wave's _________________.

• Wavelength

• Frequency

Multiple Choice

the doppler effect causes a shift in...

• pitch

• wavelength

• frequency

• All of the above

Multiple Choice

You are standing on the side of the road when a police car races past you with its siren on. After the police car passes you, what happens to the pitch of the siren?

• It increases

• It decreases

• It turns red

Multiple Choice

What best describes the doppler effect?

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer

• When sound changes pitch

• When light changes color

• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

Multiple Choice

Look at the picture. Who is experiencing a lower pitched sound?

• Observer A

• Observer B

• There is no difference

Multiple Choice

Look at the picture. Who is experiencing a higher pitched sound?

• Observer A

• Observer B

• There's no difference

Multiple Choice

When blueshift occurs, the perceived frequency of the wave would...

• Increase

• Decrease

• Stay the same

• Make duck sounds

Multiple Choice

When redshift occurs, the perceived frequency of the wave would...

• Increase

• Decrease

• Stay the same

• Make bird sounds

Multiple Choice

The vast majority of galaxies in our universe are moving away from us. We know this because we observe __________ in the galaxies absorption spectra.

• Redshift

• Blueshift

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Which discovery(ies) came from our understanding redshift/ blueshift?

• The universe is expanding

• Most galaxies are moving away from us

• All of the above

• none of the above

Multiple Choice

Use the image to identify the motion of the object relative to Earth.  Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

• It is not moving
• It is moving away from Earth (Redshift)
• It is moving towards Earth (Blueshift)
• It is moving towards Earth (Redshift)

Multiple Choice

Use the image to identify the motion of the object relative to Earth. Compare the absorption spectra of the star to what the star would look like if it were not moving at all relative to Earth.

• It is not moving relative to Earth

• It is moving away from Earth (Redshift)

• It is moving towards Earth (Blueshift)

Multiple Choice

Light can change color due to the Doppler Effect.

• True

• False