Fundamental Quantities

• intensity, flux
• inverse square law, care and feeding
• energy density, pressure
• integrated quantities
• broadband filters:
  • Dark Energy Survey g-band filter and transmission curves for CCD and system
  • LSST filter changer and transmission curves

Radiation Transfer

• conservation of surface brightness
• sources and sinks
• transfer equation

Scattering

• cross section
• mean free path
• optical depth