A black woodstove has a temperature of 200oC and a surface a

A black woodstove has a temperature of 200oC and a surface area of 2 m2. At what rate is it emitting thermal radiation?

Solution

given the temperature(T)=200degreecentigrade

=(200+273)K

=473K

surface area(A)=2m2

stefan boltzman constant(s)=5.67x10^-4W/m2K4

the thermal radiation emitted by the surface is =sAT^4

=5.67x10^-4x2x473^4J/s

=5.7x10^7W