Stellar Astrophysics Toolbox

Lightning Review of Light

• electromagnetic radiation
• electromagnetic spectrum
• photons: energy, momentum
  • photon momentum at work; source here
  • radiation pressure on steroids: monster luminous Wolf-Rayet stars Sharpless 308, WR 124
• flux
• standard candles

Photons in Thermal Equilibrium: Blackbody Radiation

• Wien's law
  
  • infrared gallery
  • multiwavelength galaxy M104
• thermal radiation
  • blackbodies and Planck / thermal spectrum; spectrum simulator
  • Wien's law; toasty example
  • Stefan-Boltzmann law