Redshift Review

Redshift Review

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Multiple Choice

What can you tell about the motion of this object?

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

Multiple Choice

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). 

Multiple Choice

Which of the listed colors has the longest wavelength?

• Blue

• Green

• Yellow

• Red

Multiple Choice

Which of the listed colors has the shortest wavelength?

• Blue

• Green

• Yellow

• Red

Multiple Choice

Which picture represents a spectral redshift?

Multiple Choice

Galaxies that are redshifted are:

• actually blue.
• really far away.
• invisible.
• moving away from us.

Multiple Choice

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

• Increase

• Decrease

• Stay the same

• Make squirrel sounds

Multiple Choice

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

• Increase

• Decrease

• Stay the same

• Make bird sounds

Multiple Choice

What is true about these stars?

• Both of these stars are moving away from us.
• Both of these stars are moving towards us.
• Both of these stars are blueshifted.
• The star Sirius is closer to us.

Multiple Choice

An object that is moving VERY fast away from Earth would have ________ than an object that is moving very slow away from Earth.

• More Redshift
• More Blueshift
• Less Redshift
• Less Blueshift

Multiple Choice

Use the image to identify the motion of the object relative to Earth. Compare the absorption spectra of the star. Which statement is correct?

• It is not moving relative to Earth

• 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. Which statement is correct?

• It is not moving

• It is moving away from Earth (Redshift)

• It is moving towards Earth (Blueshift)

• It is moving towards Earth (Redshift)