V2EX electromagnetic field

Electromagnetic Field

定义 Definition

“电磁场”:由电荷及其运动(电流)产生的物理场,包含相互耦合的电场与磁场,能在空间中存储与传递能量(如电磁波)。

发音 Pronunciation

/lktromntk fild/

例句 Examples

The electromagnetic field surrounds the wire when current flows.
当电流流过导线时,导线周围会形成电磁场。

In classical physics, Maxwell’s equations describe how an electromagnetic field changes in space and time and how it interacts with charges and currents.
在经典物理学中,麦克斯韦方程组描述电磁场如何随时间与空间变化,以及它如何与电荷和电流相互作用。

词源 Etymology

“Electromagnetic”由“electro-(电的)”与“magnetic(磁的)”组合而成,反映电与磁在物理理论中的统一;“field”在物理学中指“场”,表示一种在空间中分布、能对物体产生作用的量。该术语的普及与19世纪电磁学发展(尤其是麦克斯韦的理论)密切相关。

相关词 Related Words

文学与经典著作 Literary Works

  • James Clerk Maxwell《A Treatise on Electricity and Magnetism》(《电与磁论》)
  • Richard P. Feynman, Robert B. Leighton, Matthew Sands《The Feynman Lectures on Physics》(《费曼物理学讲义》)
  • David J. Griffiths《Introduction to Electrodynamics》(《电动力学导论》)
  • Albert Einstein《Relativity: The Special and the General Theory》(《相对论:狭义与广义》)中相关章节常讨论电磁场与参考系的关系
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