Description: 当19世纪的物理学家在描述电磁现象时发现，即使在附近没有电荷的情况下，电场和磁场也能以光速在空间传播。这些波被称为电磁波或电磁辐射。基本电磁波可根据其波长进行分类，由此产生的电磁波谱从较短波长到较长波长包括：伽马射线、X射线、紫外线、可见光、红外线、亚毫米波和射电波（包括毫米波/微波）。来自遥远天体的电磁辐射是天文学家了解这些天体的最重要的信息来源。

Related Terms:

• 电磁力
• 伽马射线
• 红外线（IR）
• 光
• 微波辐射
• 紫外线（UV）
• 可见光谱
• 亚毫米波天文学
• X射线

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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