Put the assembly into a silvered double wall vacuum thermos with a good cork seal and you should see a steady heat buildup of the air inside using an ordinary thermometer.
Lacking that a thick walled styrofoam container would be next best.
Like WW, I don't trust "accurate" IR measurements on reflective surfaces, emissivity must be also carefully considered.
Should not be difficult to test this if it is real.
Agreed! Good idea re: thermos. It hasn't arrived yet. PS - a little idea -- I bought 150 mini-lights (incandescent) on clearance sale for 1.99 -- now is a good time to look I think. These I picked up post-halloween. I measured the voltage across ONE bulb -- 2.4 V-AC. Overall, 70.1 Watts for the string of 150 lights, at 125V AC. Then I took one light - it lights very brightly at 2.4 V-DC drawing 161 mA (per my PS) = about 0.39W. At 2.8VDC draws 174mA, and a string of 150 would be 73W (approx) - so about right. The point is -- a clearance-sale string of incandescent lights provides a large supply of bulbs that light from about 0.6V-DC to 3.3V-DC no problem -- with lead wires attached! Teachers love stuff like this... I've looked for a cheap source of incandescent lamps in this voltage range -- found it. 150 0.6 to 3.3V (or so) incandescent bulbs plus lead wires, for $1.99 plus tax - that's less than 2 cents each!
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