Exam-style question
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APPARENT BRIGHTNESS case: Which option best applies the AQA A-Level Physics objective "State and apply Hubble's law." in Hubble's law using the relevant astronomical observation rather than a generic calculation?.
- A.astro-208-apparent-brightness: Use State and apply Hubble's law. in Hubble's law.
- B.astro-208-apparent-brightness: Swap Hubble's law with a different Cosmology method.
- C.astro-208-apparent-brightness: Give a number or label without linking it to the astronomical evidence.
- D.astro-208-apparent-brightness: Ignore the observation and use a generic star or telescope statement.
Model answer
What a good answer should say
- The correct option is astro-208-apparent-brightness: Use State and apply Hubble's law.
- in Hubble's law.
Explanation
Why this works
It is correct because the apparent brightness context supports state and apply Hubble's law. The distractors are weaker because they confuse observational evidence, distance scale, spectra, telescope resolution, brightness or cosmological reasoning with a nearby but different astrophysics idea.
Common mistake
No common mistake is linked to this question yet.