1. The problem statement, all variables and given/known data You are performing an experiment to validate the Stefan Boltzmann equation. What irradiance would you measure at a temperature of 109C? The emissivity of your thermal heat source is 0.81 and your thermopile measures 0 W/m2 at 27 C when directed towards a blackbody. Submit your answer in units of W/m2, do not include the units in your answer. Answer tolerance is +/- 0.2%. 2. Relevant equations E=σeT^4 3. The attempt at a solution I presume I have to work out a correction factor like this: Ec=081*5.67E-8*300^4=372 W/m2 Then calculate measured irradiance: E=5.67E-8*382^4*1=1207 Then I have to add the correction factor Ec to E to get the measured irradiance (Em): Em=Ec+E=1579 w/m2 Am I doing it right? Thanks for your answers.