Kirchhoff's law of thermal radiation rarefied material such as air, or transparent material, through which observations can be made. The interface is not a material body and can neither emit nor absorb. It is a mathematical surface belonging jointly to the two media that touch it. It is the site of refraction of radiation that penetrates it and of reflection of radiation that does not. As such it obeys the Helmholtz reciprocity principle. The opaque body is considered to have a material interior that absorbs all and scatters or transmits none of the radiation that reaches it through refraction at the interface. In this sense
Sound of a Woman homogenous textures blend together to rob this music of the personality and emotion it has when done right" and felt that the songs on the album "don't give any clues as to who Kiesza is." Sandra Sperounes of the "Edmonton Journal" conlcuded that "it's too early to tell if Kiesza will end up on the same heap of former pop-culture phenoms, but her album’s brief forays into R&B [...] hint at a much more promising and multi-dimensional future for the 25-year-old redhead." Sound of a Woman Sound of a Woman is the major label debut studio album by Canadian recording