> (Note: Glass windows are opaque to thermal cameras; the temperature measured here is the surface temperature of the window.)
This is not completely correct. Glass tends to reflect infrared radiation. For example if you view a car windscreen from the air with a thermal camera, you'll see a reflection of the sky.
It's more complicated than that, because you'll also detect the emitted blackbody radiation from the glass (for whatever temperature).
This is not completely correct. Glass tends to reflect infrared radiation. For example if you view a car windscreen from the air with a thermal camera, you'll see a reflection of the sky.
It's more complicated than that, because you'll also detect the emitted blackbody radiation from the glass (for whatever temperature).