Exam-style question
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How does the redshift of quasars provide evidence for an expanding universe?.
Model answer
What a good answer should say
- The redshift observed in quasars indicates that they are moving away from us, which is consistent with the Doppler effect.
- This evidence shows that the universe is expanding, as more distant quasars exhibit greater redshifts.
- The implication is that the expansion of the universe can be quantified, supporting the Big Bang theory.
- Thus, redshift measurements are crucial for understanding cosmic dynamics.
Explanation
Why this works
This answer effectively interprets the significance of redshift in relation to the expansion of the universe. It connects the evidence to broader cosmological theories, demonstrating a clear understanding of the implications of quasar observations.
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