W3: Spectroscopy

Question 1

Red shift

Answer 1

red shift
* spectral lines are shifted toward longer (redder) wavelengths
* object is moving away from an observer

Question 2

Blue Shift

Answer 2

blue shift
* spectral lines are shifted toward shorter (bluer) wavelengths
* object is moving toward an oberver

Question 3

What can you tell about the motion (direction) of the star from this spectrum?

Answer 3

its a red shift b/c the lines are moving towards red therefore object is moving away from the observer