真空または物質中を電磁場の振動が伝播する現象。

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2023/01/14 14:01:57」(JST)

wiki ja

電磁放射線（でんじほうしゃせん、英語: Electromagnetic radiation）とは、放射線のうち電磁波であるものをいい、一般に、赤外線、可視光線、紫外線、エックス線（X線）、ガンマ線（γ線）をさす^[1]。エックス線とガンマ線との違いは基本的にはエネルギーではなく、発生の仕方によって分けられる。ガンマ線は原子核内のエネルギー準位の遷移、エックス線は軌道原子の遷移を起源とするものである。波長だけに注目しエックス線よりも波長の短いもの（およそ10pm）をガンマ線とすることもある。

出典

[脚注の使い方]

^ 小項目事典, ブリタニカ国際大百科事典. “電磁放射線(でんじほうしゃせん)とは” (日本語). コトバンク. 2020年5月4日閲覧。

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 脳腫瘍の危険因子risk factors for brain tumors [show details]
… rigorous methodology, including direct, in-home measurement of electromagnetic fields, have concluded that a large effect of this type of radiation on the risk of adult brain tumors can be excluded . The International …
2. 急性被ばくの臨床症状、評価、診断clinical manifestations evaluation and diagnosis of acute radiation exposure [show details]
… through space as high-speed particles and/or electromagnetic waves. Radiation can be ionizing or nonionizing. Ionizing radiation has sufficient energy to displace electrons, thereby creating charged particles …
3. 妊娠中の労働working during pregnancy [show details]
…from the source of radiation. The risks of radiation exposure in pregnancy are discussed in detail separately. Non-ionizing radiation – Non-ionizing radiation (eg, electromagnetic fields emitted from …
4. 医療用レーザーの基本原則basic principles of medical lasers [show details]
…ground state, they spontaneously emit photons of energy (electromagnetic radiation). In other words, they stimulate emission of radiation . The radiation that is produced has unique properties, including monochromaticity …
5. 妊婦や授乳中の患者への画像診断diagnostic imaging in pregnant and nursing patients [show details]
… thereafter to reduce the radiation dose, and potential cancer risk, to maternal breast tissue. Magnetic resonance imaging (MRI) uses electromagnetic radio waves, rather than ionizing radiation, to generate detailed …