General
Laws of Radiation
¥All
objects above 0 K emit radiant energy
¥Hotter
objects radiate more energy per unit area than colder objects, result of 
Stefan-Boltzman Law¥The hotter the radiating body, the shorter the wavelength of maximum radiation, result of
WienÕs
Displacement Law¥Objects
that are good absorbers of radiation are also good emittersÉtodayÕs
lecture!