The borders between different sites is always an interesting point of dispute. The following question was [mod-] closed.
It was basically closed because it was about physics. I commented that it was about sensory systems and psychophysics, making it as much psychology as physics.
Another user said:
But it's not about sensory systems, [it] is [about] the perception of cold [just like a] thermometer [held] on the skin [would be] report[ing] the same thing.
To which I say that it is exactly my point and the reason it should not be closed, as this question is borderline Biology. If one asks what the wavelengths are recognized by the retinal photoreceptors, it is also not closed because it is physics (closed perhaps because of being homework and the likes, but just as an example).
I am of the opinion this question should be re-opened. Further, a borderline question like this does not deserve mod-closure, and to me it is an excellent borderline-defining Biology-inclusive question.