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A Fey 's blackbody is at 727^(@)C . Wha...

A Fey 's blackbody is at `727^(@)C` . What is the power radiated per unit area through its hole ?

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`E_(b) = simgaT^(4) = 5.67 xx 10^(-8) xx (10^(3) )^(4)`
` = 5.67 xx 10^(4) W/m^(2) ` is the required emissive power.
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