Electromagnetic radiation is energy that propagates through space as oscillating electric and magnetic fields, perpendicular to each other and to the direction of travel. It carries energy without requiring a medium and travels through a vacuum at the speed of light. Visible light, radio waves, and X-rays are all forms of electromagnetic radiation, differing in wavelength.

电磁辐射是以振荡的电场和磁场形式在空间中传播的能量,这两个场相互垂直,并都垂直于传播方向。它无需介质即可传递能量,并以光速在真空中传播。可见光、无线电波和 X 射线都是电磁辐射的形式,彼此波长不同。