Question
Problem 1. Determine the average emissivity and the rate of radiation emission from a surface, in W/m², if the spectral emissivity function of the opaque surface at 1000 K is approximated as: &=0.4, 0≤2<3 μm = 0.7, 3μm≤λ<6μm 30.3, 6μm≤λ<∞
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