A simple and rigorous formalism is presented for describing the incoherent radiative properties of absorption, emission, and scattering of an opaque body in local thermodynamic equilibrium; polarization, inelastic scattering, and applied-magnetic-field effects are treated in full. The radiative behavior of such a body is shown to be completely characterized by the local bispectral bidirectional reflectivity matrix. Expressions for the emitted and reflected Stokes vectors of the source radiation are given in terms of this matrix. Use is made of the most general forms of the reciprocal relations and Kirchhoff’s law; derivations are also provided.
© 1991 Optical Society of America
Original Manuscript: February 18, 1991
Manuscript Accepted: July 10, 1991
Published: December 1, 1991
E. C. Zimmermann and Amnon Dalcher, "Incoherent radiative properties of an opaque body," J. Opt. Soc. Am. A 8, 1947-1954 (1991)