GEOB 200 Lecture Notes - Lecture 7: List Of Dragonlance Characters, Longwave, Shortwave Radio
25 Sep 2017
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Radiation that is given off from the earth atmosphere system, around 10 microns and have temperatures far less than the sun. Exchanged between sky, surface and all surrounding objects (trees and etc. ) You can"t see long-wave radiation (unlike short wave radiation) Kirchhoff"s law: assuming no transmission, the absorptivity (the absorption of a particular wavelength) equals it"s emissivity (emits the same wavelength) --> a good absorber is a good emitter. Only applies to wavelengths that are the same (they don"t apply to two wavelengths that are different) His law only applies to long wave as there are no other temperatures in the earth-atmosphere system that are hot enough. Stefan-boltzmann law: most objects emit radiation almost perfectly (as a full emitter, i. e. a blackbody emitter), the law looks at how surfaces emit radiation (emittance) Most surfaces are opaque to the long wave.
