Question

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 luminous object travels alongside an observer.
a luminous object travels alongside an observer.

a distant luminous object travels rapidly towards an observer.
a distant luminous object travels rapidly towards an observer.

a distant luminous object travels rapidly away from an observer.

Answers

GPT-4o mini
Blueshift is observed when **a distant luminous object travels rapidly towards an observer.**