3 ms·
As it turns out, even on earth's surface, radiation is a more efficient heat transfer method than conduction and convection through the air. Objects under a cle
by lutusp 13y ago
As it turns out, even on earth's surface, radiation is a more efficient heat transfer method than conduction and convection through the air. Objects under a clear sky quickly drop below air temperature in many circumstances.
- hrkristian 13y agoThank you! I did an hour jog tonight, and most of that time was spent trying to figure out why there was frost on the ground with an air temperature above freezing and a warm breeze.
- dTal 13y agoI wonder if heat might also be conducting downwards to the frozen ground below.
- grogenaut 13y agoWhat he's trying to say is that if you toss a rock into liquid helium or a 4 Kelvin zero g vacuum it's going to get colder faster via direct contact with the helium than via radiation in the vacuum.
- mpyne 13y agoWow, that seems amazing but now that you mention it I think I've heard of that happening even in deserts.