Blueshift is observed when:(1 point)
Responses
a luminous object is stationary compared to an observer.
a luminous object is stationary compared to an observer.
a distant luminous object travels rapidly away from an observer.
a distant luminous object travels rapidly away from an observer.
a luminous object travels alongside an observer.
a luminous object travels alongside an observer.
a distant luminous object travels rapidly towards an observer.