Physics 5 (Option): Mod 4 - Cosmology

Physics 5 (Option): Mod 4 - Cosmology

1. Doppler Effect

   • z values
   • equations relating change in frequency or wavelength with speed
   • Calculations on binary stars, galaxies and quasars

2. Hubble's law

   • Red shift, z values
   • Hubble's constant, distance and speed
   • Expansion of universe
   • Estimation of age of universe
     • Assuming constant H
   • Big bang theory
     • Evidence from cosmological microwave background radiation
     • Relative abundance of H and He

3. Quasars

   • Most distant measurable objects
   • Discovery as bright radio sources
   • Large optical red shifts
     • Estimation of distance