放ほう射しゃ圧あつ

noun

radiation pressure

Physics term for the pressure exerted by electromagnetic radiation on a surface.

• 太たい陽よう光こうの放ほう射しゃ圧あつは非ひ常じょうに小ちいさいが、宇う宙ちゅう空くう間かんでは無む視しできない。

  The radiation pressure of sunlight is very small, but it cannot be ignored in space.