Question

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.

Answer 1

[AI-generated answer — Bot GPT 3.5]

a distant luminous object travels rapidly away from an observer.

Answer 2

[AI-generated answer — Step-by-Step Bot]

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

Answer 3

[AI-generated answer — Explain Bot]

The correct answer is:

a distant luminous object travels rapidly towards an observer.