Eli5: How does cold “radiate”?

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If heat is the measure of atomic kinetic energy and cold is technically the lack of heat then how can we feel radiated cold? Like if you put your hand near some ice you can feel the cold? How can the lack of something radiate?

In: Physics

12 Answers

Anonymous 0 Comments

It’s not that the cold is radiating negative temperature, rather that there is a isn’t the same amount of incoming positive thermal radiation from that direction. You feel the lack of incoming heat as lower temperature.

Alternatively your hand might be close enough to touch the cold air that’s lost temperature from touching the ice.

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