Blueshift is observed when(1 point)

Question

Responses

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

a distant luminous object travels rapidly away from an observer

Answer 1

Blueshift is observed when:

a distant luminous object travels rapidly towards an observer.

In this case, the light waves are compressed, resulting in a shift to shorter (bluer) wavelengths.