Question

Redshift is observed when:(1 point)
Responses

a luminous object is stationary relative to an observer.
a luminous object is stationary relative to an observer.
a distant luminous object travels rapidly away from an observer.
a distant luminous object travels rapidly away from an observer.
a distant luminous object travels rapidly towards an observer.
a distant luminous object travels rapidly towards an observer.
a luminous object is traveling alongside an observer.

Answer 1

a distant luminous object travels rapidly away from an observer.