Matter waves, particles and cosmology

What this note covers

1. Matter-wave evidence extends wavelength beyond light
2. Quarks and leptons organise matter without making atoms elementary
3. Interactions and decay equations require conservation checks
4. Redshift and distance reveal large-scale expansion
5. Background radiation and light elements test a hot early Universe
6. Dark matter and dark energy identify open explanatory problems

6 sections · 10 key terms & formulas · 6 common mistakes