Exam-style question
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Explain how redshift supports the theory of an expanding Universe.
Model answer
What a good answer should say
- Redshift occurs when light from distant galaxies is stretched to longer wavelengths as they move away from us, indicating that the Universe is expanding.
Explanation
Why this works
This question assesses the understanding of redshift and its implications for cosmology. A strong answer connects the concept of redshift to the evidence of an expanding Universe, demonstrating comprehension of the Doppler effect and its astronomical significance.
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