Physics A-Level
Red giant branch
What Red giant branch means in Physics A-Level, as defined for AQA.
Definition of Red giant branch
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Reference: AQA
The region reached when the core contracts while outer layers expand and cool, giving higher luminosity and lower temperature.
Topics that use Red giant branch
- The Hertzsprung-Russell (HR) diagram (A-level only) (AQA A-Level)
Related terms
- absolute magnitude
- Giants and supergiants
- HR diagram
- Luminosity
- Main sequence
- Reversed temperature axis
- spectral class
- Surface temperature axis
Using Red giant branch in the exam
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