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Cosmology (A-level only)

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Question 10

The table below contains observational data for two galaxies.

GalaxyRedshift, zzzDistance from Earth / ly\text{ly}ly
UGC 12345.6×10−35.6 \times 10^{-3}5.6×10−37.5×1077.5 \times 10^77.5×107
UGC 56782.4×10−32.4 \times 10^{-3}2.4×10−33.6×1073.6 \times 10^73.6×107
1.

Discuss whether these data are consistent with Hubble’s Law.

[3]
2.

Quasars are some of the most distant observable objects in the universe. Discuss one difficulty in using standard candles (such as Type Ia supernovae) to determine the distance from the Earth to a very distant quasar.

[2]
Markscheme

Cosmology (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Cosmology (A-level only)

15 exam-style questions on AQA A Level Physics Cosmology (A-level only), covering Doppler effect (A-level only), Hubble's law (A-level only), Quasars (A-level only), and Detection of exoplanets (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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