What is a Laser and how does it differ from daylight?
A laser is a device that emits a special form of light. The light is special because it consists of light waves of a single wavelength in which all the waves reinforce one another. If you think of heavy surf with large waves breaking on a beach instead of many small waves, you get the sense of COHERENT light, where the waves reinforce one another. The term LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. Radiation in this case refers to the coherent light energy released which produces the laser beam. Normal daylight is incoherent light It consists of all of the colors of the rainbow, with wavelengths from 400 nanometers (nm), where the light is a blue color, to the rich, red wavelengths of 750 (nm). Our therapeutic veterinary lasers generate light at a wavelength of 904 (nm); this means that without special viewing equipment, you cannot see it.
