How does coherent light differ from ordinary or incoherent light.?
Ordinary light (from the Sun, from light bulbs, etc) which consists mainly of light waves of many different wavelengths (colours). What light there is of the same wavelengths tends to be out of phase as well. Versus coherent light, which can only by produced by lasers. Laser light, unlike ordinary light, is unique in that it usually consists of only a single color of light.
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