... not be 1 atmosphere so the water will not boil at exactly 1000C. I will record a reading of mV from a thermopile. As one of the sides is black, I will assume it is an ideal blackbody with an emissivity of 1. By then dividing the mV reading from the 3 other sides by this value, I will be able to determine their emissivity with mV/mV, giving a unit less constant as expected. Experiment 3 Stefan-Boltzmann lamp I will place the thermopile near a light bulb. I will then vary the power of the light bulb and record readings from the thermopile (P`) at various voltages from 1 to 12 with intervals of 1 volt. From this I will be able to produce a graph which should show that P` varies with the fourth power of T. To do this I will plot a graph of lnP` against lnT. Temperature is related ...

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