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辐射分为几种
更新时间: 2020-10-31 00:00:00  

辐射分为两种,分为正辐射和负辐射,冬季人们在火炉、暖气旁取暖,这是热辐射,也称为正辐射;而当人在靠近冰冷的袭墙壁或寒冷的物体时,会产生冷的感觉,这是因为冷辐射,或称之为负辐射。相对而言,辐射指的是由场源发出的电磁能量中一部分脱离场源向远处传播,而后不再返回场源的现象,能量以电磁波或粒子(如阿尔法粒子、贝塔粒子等)的形式向外扩散。

关键词: 辐射 分为

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