A Level Physics AQA 9.2.5 9.2.5 Hertzsprung-Russell DiagramsTest yourself Hertzsprung-Russell (HR) Diagrams The Hertzsprung-Russel diagram (HR diagram) is a plot of luminosity against temperature. HR diagram Most stars have a position on the HR diagram. On this diagram, the Sun is at a ...
2.2.2The Photoelectric Effect Explanation 2.2.3End of Topic Test - The Photoelectric Effect 2.2.4Collisions of Electrons with Atoms 2.2.5Energy Levels & Photon Emission 2.2.6Wave-Particle Duality 2.2.7End of Topic Test - Absorption & Emission 3Waves 3.1Progressive & Stationary Waves 3.1.1Progres...
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