Nontechnical explanation Ordinary light waves travel as a chaotic, jumbled blend of colors.
Laser light travels in synchronized, matching waves of a single precise color.
Infrared laser light's synchronized, matching waves are comparatively long from peak to peak. Since infrared and ultraviolet colors are invisible, our logo represents them with red and violet, respectively. Most lasers shine in only one set color, but a free-electron laser can be tuned to any color within a range of wavelengths. For Jefferson Lab free-electron lasers , this capability and others promise a wide spectrum of industrially and scientifically useful applications .