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Thermal radiation experiment, question

  1. May 28, 2010 #1
    Hiya, I'm doing an experiment to see how thermal radiation affects the temperature of water. I have a container with water inside, which is heated up with a piece of led that rests on the surface of the water. It conducts heat 'sinusoidally', not sure how to describe it. There are seven sensors in the water at different depths that measure the temperature. There is a cooling system around the container so that the water temperature doesn't keep rising but stabilizes. Once the temperature is stable, I start measuring. See attachment for results.

    The question, what I would expect to see from the sensors is sinus shapes. What I see is more like waves that climb faster than they descend. Can anyone think of an explanation for this?
     

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  2. jcsd
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