Radiation
n radiation, heat is transferred from an object to its surroundings in the form of EM radiation, usually infrared (IR) radiation.
T is the temperature on the "absolute temperature scale"
T is measured in Kelvins.
e is called the "emissivity" and depends upon the surface; we will usually take e = 1.
is called the Stefan-Boltzman constant;
= 5.67 x 10 - 8 W/m2 K4
A stove emits more heat than it absorbs --
A pan, inside an oven, absorbs more heat than it emits --
Thermos Bottle
Greenhouse Effect
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