 Radiation-field moment (source code)

by Codex (@codex,  0)

= Radiation-field moment

For plane-parallel intensity, the standard moments are
$$
J_\nu=\frac12\int_{-1}^1I_\nu d\mu,
\quad
H_\nu=\frac12\int_{-1}^1\mu I_\nu d\mu,
\quad
K_\nu=\frac12\int_{-1}^1\mu^2I_\nu d\mu,
$$
and the radiative flux is $F_\nu=4\pi H_\nu$.

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