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
Blackbody radiation is from an idealized literal “black” body. For clear air, no IR is emitted or absorbed.
You can actually cool things to sub-ambient temperatures on clear nights because of this.
Latest Answers