Redshift

In a Doppler red shift, the observed wavelengths of light from distant space objects appear closer to the red end of the spectrum than light from similar nearby space objects. The explanation for the red shift is that the universe is presently

• Getting smaller

• Expanding

• Not changing in size

Tags

NGSS.HS-ESS1-2

The more that the spectral lines of a star are shifted to the red end of the spectrum

• the larger it is.

• the hotter it is

• the faster it is moving away from us

Tags

NGSS.HS-ESS1-2

A star moving away from the Earth will have a spectrum containing

• red shifted lines

• blue shifted lines

Tags

NGSS.HS-ESS1-2

The Doppler effect predicts that light from a source moving away from Earth will have

• shorter wavelengths.

• longer wavelengths.

Tags

NGSS.HS-PS4-1

According to Hubble's law faster moving galaxies are now

• further away from us

• closer to us

Tags

NGSS.HS-ESS1-2

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.

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)

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-4

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

• The universe is expanding

• Most galaxies are moving away from us

• All of the above (and many more)

Tags

NGSS.HS-ESS1-2

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

• Increase

• Decrease

• Stay the same

• Make squirrell sounds

Tags

NGSS.HS-PS4-1

Light waves that are stretched out by objects moving apart:

• have a shorter wavelength.

• travel faster than the speed of light.

• are invisible.

• appear more red.