Exam-style question
Try this first
Which of the following best describes cosmological redshift?.
- A.A shift due to motion towards the observer.
- B.A shift due to the expansion of space.
- C.A shift caused by gravitational effects.
- D.A shift that indicates a galaxy's age.
Answer and explanation
Attempt the question first, then reveal the model answer and explanation.
Common mistake
No common mistake is linked to this question yet.