Redshift

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.

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
• Turbulance
• Superposition

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

All electromagnetic waves travel at 

• Speed of Sound
• the Speed of Light
• the speed of gravity
• no idea

What property of this wave is represented by the letter "A"

• amplitude

• crest

• trough

• wavelength

Which section of the spectrum is the ONLY one we can see?

• X-rays
• Visible Light
• Gamma Rays
• Ultraviolet Rays

A red shift in the observed light from very distant galaxies suggests that the universe is

• fixed and stationary  
• contracting continuously
• moving randomly
• constantly expanding

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

In our expanding universe

• Galaxies are moving away from each other due to gravity.
• More distant galaxies experience less redshift.
• The Milky Way is at the center of the expansion.
• Galaxies appear to move away due to the expansion of space itself.