Unformatted text preview: electromagnetic waves StefanBoltzmann law of radiation Q = e σ T 4 At The radiant energy Q emitted during a time t by an object whose surface area is A and whose Kelvin temperature is T; σ = 5.67 x 108 J/(sm 2 K 4 ) is the StefanBoltzmann constant and e is the emissivity a dimensionless number characterizing the surface of the object Net radiant power P net = e σ A(T 4 T o 4 ) The power an object emits minus the power it absorbs. The net radiant power P net emitted by an object of temperature T located in an environment of temperature T...
View
Full Document
 Spring '08
 Sharp
 Thermodynamics, Convection, Energy, Heat, Heat Transfer, Black body

Click to edit the document details