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**Edisesyethisp** · 08-23-2011, 04:29 PM

I find this a little confusing. If the tube of c02 was absorbing the heat/IR from the candle?
1. Why does the camera not show the tube getting warm? or showing the absorption of the IR?

The tube IS getting warmer, but really slowly. It is also cooling down by contact with the surrounding air. If you isolated the tube, it would take a while for it to heat up enough to start to irradiate on the IR wavelength. Non-isolated, even longer (if at all).

2. How do they know the tube was getting warm if there was no way to measure the heat inside the tube?

Law of conservation of energy.

3. Could the c02 be reflecting the heat rather than absorbing?

some might be reflected, but most gets absorbed.

08-23-2011, 04:29 PM	#1
Edisesyethisp Join Date Oct 2005 Posts 553 Senior Member	Can you help me understand this experiment? I find this a little confusing. If the tube of c02 was absorbing the heat/IR from the candle? 1. Why does the camera not show the tube getting warm? or showing the absorption of the IR? The tube IS getting warmer, but really slowly. It is also cooling down by contact with the surrounding air. If you isolated the tube, it would take a while for it to heat up enough to start to irradiate on the IR wavelength. Non-isolated, even longer (if at all). 2. How do they know the tube was getting warm if there was no way to measure the heat inside the tube? Law of conservation of energy. 3. Could the c02 be reflecting the heat rather than absorbing? some might be reflected, but most gets absorbed.
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