Aronson R
Bioimaging Sciences Corporation, West Orange, New Jersey 07052, USA.
J Opt Soc Am A Opt Image Sci Vis. 1997 Feb;14(2):486-90. doi: 10.1364/josaa.14.000486.
The usual reciprocity relations of radiative transfer do not hold two points located in regions of different index of refraction. Modified reciprocity relations that involve the relative index are derived. The result has computational as well as theoretical consequences.