noun
Technical term for heat transferred via electromagnetic radiation, as from the sun or a heater.
太陽からの放射熱で地面が温まる。
The ground is warmed by radiant heat from the sun.
ストーブの放射熱が部屋全体に広がる。
The radiant heat from the stove spreads throughout the room.
Conductive heat, transferred through direct contact, while radiant heat does not require a medium.
Compound of 放射 (radiation) and 熱 (heat).