Astrophysics (Index)About

Planck function

(Planck's law)
(yields black body curve)

The Planck function is a function of wavelength and temperature that describes a distribution of the spectral radiance at each wavelength in black-body radiation.

         2hν3      1
B(ν,T) = ———— —————————————
          c2  ehν/(kBT) - 1

Radiance is the quantity of radiation emitted through a surface into a given solid angle, spectral radiance being the radiance at a given wavelength.

(function,physics,EMR,black body)
Further reading:

Referenced by pages:
black-body radiation
brightness temperature (TB)
noise-equivalent power (NEP)
Rayleigh-Jeans law
Rosseland mean opacity
spectral signature
thermal emission
Wien approximation