Pointed my IR laser at the sky today, and it showed about -12.2 celsius. Is there no blackbody radiation in the air? Or there is such gases like Nitrogen? Argon? Also, how far does the laser reach into the sky?
In: Physics
One thing that I haven’t seen mentioned yet is that an infrared thermometer needs to be adjusted for the emissivity of what you are trying to measure. Different substances emit different amount of IR at temperatures. If you don’t adjust for this you can be way off.
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