Exam-style question
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Describe the significance of Hubble's law in relation to redshift and the expansion of the Universe.
Model answer
What a good answer should say
- Hubble's law states that the velocity at which a galaxy recedes is directly proportional to its distance from us, which is observed through redshift.
- This relationship implies that the farther away a galaxy is, the faster it is moving away, supporting the theory of an expanding Universe.
Explanation
Why this works
This answer highlights the relationship between Hubble's law and redshift, illustrating how these concepts are interlinked in explaining the expansion of the Universe. It assesses the student's ability to connect theoretical principles with observational evidence.
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