Can You Use an Infrared Camera to Detect a Fever?
It turns out that the highest-intensity wavelength produced—the peak in the curve above—depends on the temperature of the object. As it gets hotter, the wavelength of peak emission decreases—it moves to the left, back towards the visible spectrum. So for something at room temperature (like 300 Kelvin), this peak wavelength is about 9.7 μm (micrometers). […]
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