新闻标记为辐射

在物理学中，辐射描述了任何过程，其中一个体发出的能量通过介质或通孔，最终被另一个身体吸收。Non-physicists often associate the word with ionizing radiation (e.g., as occurring in nuclear weapons, nuclear reactors, and radioactive substances), but it can also refer to electromagnetic radiation (i.e., radio waves, infrared light, visible light, ultraviolet light, and X-rays) which can also be ionizing radiation, to acoustic radiation, or to other more obscure processes. What makes it radiation is that the energy辐射（即，它从源自到各个方向的直线向外行进。该几何形状自然地导致了一个同样适用于所有类型辐射的测量系统和物理单元。