Quote:
Originally Posted by doug30293
What you probably saw was the effect of one of the fudge factors in the Stefan-Boltzmann law of thermal radiation. It is called the view factor function. The maximum perceived radiation will be perpendicular to the surface. Hence, view factor...
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When I held the IR-thermometer out to the side, I made sure that it was also perpendicular to the surface.
If anything, that measurement was too high, because the heat from my arm was "visible" to the IR-thermometer. Although it occurred to me to do so, I just didn't feel like duct taping the IR device to a stick.
Do you doubt that heat radiated from the body can be reflected from an aluminum surface and measured with an IR-thermometer?
-AC