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## Homework Statement

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%.

## Homework Equations

E=

**σeT^4**

3. The Attempt at a Solution

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.