Physics GCSE
comparing galaxy spectra
What comparing galaxy spectra means in Physics GCSE, as defined for AQA.
Definition of comparing galaxy spectra
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Reference: AQA
Reading the dark lines of two galaxies so that the one shifted further towards the red end has the greater red-shift.
Topics that use comparing galaxy spectra
- Red-shift (physics only) (AQA GCSE)
Related terms
- absorption line spectra
- accelerating expansion
- dark energy
- dark mass and dark energy
- expanding universe
- increase in wavelength
- measuring distance
- receding galaxies
Using comparing galaxy spectra in the exam
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