Exam-style question
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How does high redshift imply large distance for quasars?.
- A.It indicates they are moving away from us.
- B.It shows they are older than nearby stars.
- C.It means they are cooler than other celestial bodies.
- D.It suggests they have lower mass.
Model answer
What a good answer should say
- It indicates they are moving away from us.
Explanation
Why this works
High redshift in quasars indicates that they are receding from us at high speeds, which correlates with greater distances due to the expansion of the Universe.
Common mistake
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