Physics A-Level
Redshift
What Redshift means in Physics A-Level, as defined for AQA.
Definitions of Redshift
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Reference: AQA
A shift of spectral lines that gives the recession speed, often using Δλ/λ₀ = v/c for speeds much less than c.
Observed wavelengths longer than rest wavelengths, corresponding to recession.
Topics that use Redshift
- Doppler effect (A-level only) (AQA A-Level)
- Hubble's law (A-level only) (AQA A-Level)
Related terms
- Age of the universe
- Big Bang nucleosynthesis
- Cosmological redshift
- Doppler effect
- Hubble's law
- Quasar
- Cosmological microwave background radiation
- Expansion of the Universe
Using Redshift in the exam
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