How does laser light differ from ordinary light?
Answered by HowStuffWorks
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  1. Laser light is very different from the kind of light that a regular lamp gives off. Ordinary light photons are emitted without any pattern but laser light is organized in a coherent manner so that each photon follows the same course as the other, like well-trained troops marching. Additionally, ordinary light is diffused without specific direction unlike light from a laser, which is compact and directional with a tight beam. Laser light is monochromatic (all one color) because it is all one wavelength as determined by the amount of energy released.

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