Eli5: How does cold “radiate”?

Question

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

Answer 1

2nd law of thermodynamics. Heat can only flow from a hot ‘thing’ to a ‘cold’ thing. It’s the Law! Cold is the absence of heat. Heat is the movement of atoms/molecules in a system.