- Electromagnetic radiation produced by natural phenomena such as lightning.
大气电,自然电波由自然现象,如闪电等产生的电磁辐射等
- 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.
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
- A specific range of wavelengths or frequencies of electromagnetic radiation.
波段,波带电磁辐射的波长和频率的特定范围
- Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
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