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What kind of theory & technology is involved in an IR Thermometer?

April 26, 2017involved IR Technology Theory thermometer

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What kind of theory & technology is involved in an IR Thermometer?

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Quantum physics is the key theory: the total radiation energy is proportional to the fourth power of the absolute temperature (Stefan-Boltzmann Law). Wien Displacement Law: the product of the peak wavelength and the temperature is found to be a constant. Wien was awarded the Nobel Prize for Physics for the year 1911.