noun
electromagnetic radiation
Technical term in physics; refers to waves of the electromagnetic field propagating through space, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
電磁放射線には、電波やX線などが含まれる。
Electromagnetic radiation includes radio waves, X-rays, and so on.
この装置は電磁放射線を測定するために使われる。
This device is used to measure electromagnetic radiation.
電磁波 is a more common term for electromagnetic waves, while 電磁放射線 emphasizes the radiation aspect and is used in more technical contexts.
Compound of 電磁 (electromagnetic) + 放射線 (radiation). The term is a direct translation of the English 'electromagnetic radiation'.