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CAIE A-Level Physics A2 25.3 Hubbles Law and the Big Bang Theory Questions

Practise quantifying redshift, calculating recession speed with spectral data, applying Hubble’s law and linking expansion evidence to the Big Bang.

Syllabus
2028–2030
Course
Physics 9702
Level
A2

Exam points

  • identify and quantify redshift by comparing observed and known spectral lines
  • use ??/? ? ?f/f ? v/c to determine recession speed or spectral shift
  • explain how redshift observations support an expanding Universe
  • use Hubble?s law to calculate cosmic distance or recession speed and relate it to the Big Bang

Covered syllabus points

25.3.1—The lines in the emission and absorption spectra25.3.2—Redshift of electromagnetic radiation25.3.3—Why redshift leads to the idea that the universe is expanding25.3.4—Hubble’s law v ≈ H0d and explain how this leads to the Big Bang theory

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