名詞 electromagnetic radiation:

1. radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
   同義詞：electromagnetic wave, nonparticulate radiation

1. Electromagnetic radiation produced by natural phenomena such as lightning.
   大氣電，自然電波由自然現(xiàn)象，如閃電等產(chǎn)生的電磁輻射等
2. 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.
   激光器使偶然的混雜頻率的電磁輻射，變?yōu)橐粋€(gè)或更多的高度強(qiáng)化和連續(xù)的紫外線、可見光或紅外線輻射的分離頻率儀器中的一種
3. A specific range of wavelengths or frequencies of electromagnetic radiation.
   波段，波帶電磁輻射的波長和頻率的特定范圍
4. Electromagnetic radiation used to raise atoms or molecules to a higher energy level.
   電磁輻射能用來將原子或分子提升到較高能級(jí)的電磁輻射