U6L1-2

What is the Doppler Effect?

• The bending of light as it passes through a lens

• The increase or decrease in the frequency of waves relative to an observer due to the motion of the wave source

• The splitting of white light into its component colors

• The reflection of sound waves from a surface

Tags

NGSS.HS-PS4-1

What happens to the frequency of light waves from a star moving towards Earth?

• The frequency decreases

• The frequency increases

• The frequency remains the same

• The frequency disappears

Tags

NGSS.HS-PS4-1

What is the term for the shift of spectral lines toward the blue end of the spectrum?

• Redshift

• Blueshift

• Greenshift

• Yellowshift

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

What is observed when a star is moving away from Earth?

• Blueshift

• Redshift

• No shift

• Frequency increases

Which galaxy shows a blueshift in its spectrum as it moves towards the Milky Way?

• Andromeda galaxy

• Triangulum galaxy

• Whirlpool galaxy

• Sombrero galaxy

Tags

NGSS.HS-ESS1-2

When a star is moving away from Earth, what happens to the frequency of its light waves?

• The frequency increases

• The frequency decreases

• The frequency stays the same

• The frequency doubles

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which end of the light spectrum do the lines shift toward when a star is moving away from Earth?

• Blue end

• Red end

• Green end

• Yellow end

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Which phenomenon explains why the Andromeda galaxy’s spectrum is blueshifted?

• It is moving away from the Milky Way

• It is moving towards the Milky Way

• It is stationary relative to the Milky Way

• It is rotating on its axis

Tags

NGSS.HS-ESS1-2

If a star’s spectral lines are observed to shift toward the red end, what can be inferred about its motion relative to Earth?

• The star is moving towards Earth

• The star is moving away from Earth

• The star is stationary

• The star is rotating

Tags

NGSS.HS-ESS1-2

Explain why the frequency of light increases when a star moves towards an observer.

• The waves are stretched out

• The waves are compressed

• The waves are absorbed

• The waves are reflected

Tags

NGSS.HS-PS4-1