In order of decreasing wavelength (distance between successive wave crests), electromagnetic radiation consists of radio waves, infrared rays, visible light, ultraviolet rays, X rays, and gamma rays.

• 按照波长（两个相邻波峰间的长度）渐小的顺序排列，电磁辐射由这样一些辐射波组成，红外线、可见光、紫外线、X射线和伽玛射线。