Blueshift is observed when _________________________________________.(1 point) Responses a distant luminous object travels rapidly towards an observer. a distant luminous object travels rapidly towards an observer. a luminous object travels alongside an observer. a luminous object travels alongside an observer. 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.

Blueshift is observed when a distant luminous object travels rapidly towards an observer or when a luminous object travels alongside an observer.