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
Son of a Son of a Sailor (song) melody has changed somewhat. Nadirah Shakoor sings the second half of the second verse. A couple of corners were cut, particularly the final chorus and outro. This is the version that Buffett continues to play, and is what the re-recording on "" and the sound board live albums sound like. Son of a Son of a Sailor (song) "Son of a Son of a Sailor" is a song written and performed by American popular music singer-songwriter Jimmy Buffett. It's the opening track of the 1978 album of the same name. The song is a fan favorite, although it wasn't a