Redshift

When objects move towards you, the wavelength....

• Increases (gets longer)

• Decreases (gets shorter)

Tags

NGSS.HS-PS4-1

When objects move away from an observer, how do we describe the shift in wavelength?

• Red Shift

• Blue Shift

Tags

NGSS.HS-PS4-3

The top spectra is the laboratory spectra and is not moving. What type of shift is shown with the bottom spectra and is the object moving towards or away from the observer?

• Red Shift

  Towards

• Red Shift

  Away

• Blue Shift

  Towards

• Blue Shift

  Away

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

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

• It is not moving

• It is moving away from Earth (Redshift)

• It is moving towards Earth (Blueshift)

• It is moving towards Earth (Redshift)

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

In redshift, the wavelengths of light become...

• a different color

• shorter

• longer

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

Based on the observed spectrum as compared to the laboratory source, how is the galaxy moving?

• Away

• Towards

• Stationary

Tags

NGSS.HS-ESS1-2

Based on these spectra, which Galaxy is moving at the fastest speed away from the Milky Way?

• Galaxy B

• Galaxy C

• Galaxy D

The absorption lines in the spectrum for Galaxy A are _____ when compared to the lines for the Milky Way.

• red-shifted

• blue-shifted

Tags

NGSS.HS-PS4-3

The spectral lines for the Distant Galaxy are ___, indicating it is moving ___ us.

• red-shifted, toward

• red-shifted, away from

• blue-shifted, toward

• blue-shifted, away from

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

In the 1920s Edwin Hubble made observations of of many distant galaxies and formulated Hubble’s law which states that galaxies that are

• more distant are moving away faster with a greater apparent redshift in their spectra

• more distant are moving away slower with a greater apparent redshift in their spectra

• more distant are moving away faster with a greater apparent blueshift in their spectra

• more distant are moving away slower with a greater apparent blueshift in their spectra

Tags

NGSS.HS-ESS1-2