Definition Of radiate
diverge or spread from or as if from a central point.
he ran down one of the passages that radiated from the room
emit (energy, especially light or heat) in the form of rays or waves.
the hot stars radiate energy
having rays or parts proceeding from a center; arranged in or having a radial pattern.
the radiate crown
Example Of radiate
A fine figure of a man, he radiates masculine self-assurance, a quality that interested the Queen greatly.
After sunset, the heat radiates upward, lowering temperatures near the ground.
Although new stars primarily radiate ultraviolet light, the dust they generate absorbs that light and re-emits it in the near-infrared.
An electron orbiting in one of these ‘allowed’ orbits has a defined energy state, does not radiate energy, and does not spiral into the nucleus.
As the wood burns, chemical potential energy becomes kinetic energy like heat which can presumably radiate out of the fixed area of space you defined in your question.