电磁辐射能用来将原子或分子提升到较高能级的电磁辐射 Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
一种把下述光谱范围内的电磁辐射转换成电流的装置：红外线、可见光和／或紫外线。 A device for converting electromagnetic radiation in the infra-red, visible and/or ultra-violet regions of the spectrum into an electric current.
大气电，自然电波由自然现象，如闪电等产生的电磁辐射等 Electromagnetic radiation produced by natural phenomena such as lightning.
激光器使偶然的混杂频率的电磁辐射，变为一个或更多的高度强化和连续的紫外线、可见光或红外线辐射的分离频率仪器中的一种 Any of several devices that convert incident electromagnetic radiation of mixed frequencies to one or more discrete frequencies of highly amplified and coherent ultraviolet, visible, or infrared radiation.
