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Quantifying light, LIght - Coggle Diagram

- - - - definition of magnitude: m=-2.5logF+C
      - small magnitude difference and flux ratios
      - visual/ bolometric magnitude
      - absolute magnitude: m at 10pc, distance modules: m-M=5logd-5
      - color index B-V, related to temperature
    - - flux: F=E/dAdt, spectral flux density
      - erg: g*cm^2/s^2, 10^-7J
    - - Wien's displacement law
      - Wien's/ Rayleigh-Jeans approximation
      - Effective temperature
      - intensity/ surface brightness