Preisendorfer, R.W.2005-09-102005-09-101976http://udspace.udel.edu/handle/19716/1576This second volume of a set of six volumes of the text on hydrologic optics deals with foundations: radiometric and photometric concepts and the interaction principle. Detailed treatment is given on: radiant flux; the meaning and fundamental geometric properties of radiant flux; irradiance and radiant emittance; radiance; an invariance property of radiance; scalar irradiance, radiant energy, and related concepts; vector irradiance; radiant intensity; polarized radiance; transition from radiometry to photometry; generalized photometries; the interaction principle; reflectance and transmittance operators for surfaces; applications to plane surfaces; applications to curved surfaces; reflectance and transmittance operators for plane-parallel media; applications to plane-parallel media; interaction operators for general spaces; applications to general spaces; derivation of the beam transmittance function; derivation of the volume attenuation function; derivation of path radiance and path function; derivation of apparent-radiance equation; derivation of volume scattering function; equation of transfer for radiance; integral structure of the interaction operators and summary of the interaction method. (OEIS)24350716 bytesapplication/pdfen-USReflectanceHydrologic opticsPhotoelectric effectsScalar irradianceTransmittanceUnderwater lightTechnical Report