noun, noun which may take the genitive case particle 'no'
radiant heat; photothermal
Technical term in physics and engineering for heat transferred by electromagnetic radiation, especially infrared. Often used attributively with の.
輻射熱で部屋が暖まる。
The room is warmed by radiant heat.
輻射熱の影響を計算する。
Calculate the effect of radiant heat.
Compound of 輻射 (ふくしゃ, 'radiation', literally 'spoke-like emission') and 熱 (ねつ, 'heat'). The term is a technical calque from Western physics.