Exam-style question
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What evidence supports the link between quasar luminosity and active galactic nuclei?.
- A.The presence of redshift in their spectra.
- B.Their consistent brightness across all distances.
- C.The correlation between their luminosity and the mass of the central black hole.
- D.Their isolation from other galaxies.
Model answer
What a good answer should say
- The correlation between their luminosity and the mass of the central black hole.
Explanation
Why this works
Observations show that more luminous quasars tend to have more massive central black holes. This correlation provides evidence that the energy output of quasars, linked to their luminosity, is a result of the processes occurring in the active galactic nucleus powered by these black holes.
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