Physics GCSE
dark mass and dark energy
What dark mass and dark energy means in Physics GCSE, as defined for AQA.
Definition of dark mass and dark energy
Check what you remember
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Reference: AQA
Dark mass is needed to explain the way galaxies rotate, and dark energy is needed to explain the accelerating expansion; neither has been detected directly.
Topics that use dark mass and dark energy
- Red-shift (physics only) (AQA GCSE)
Related terms
- absorption line spectra
- accelerating expansion
- dark energy
- expanding universe
- increase in wavelength
- measuring distance
- receding galaxies
- red end of the spectrum
Using dark mass and dark energy in the exam
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