Please describe some applications of laser. A mplification by S timulated E mission of R adiation. A laser is a device which produces a narrow beam of coherent light, capable of travelling over vast distances without dispersion, and of being focused to give enormous power density. The beam remains parallel for long distances and contains one or more extremely pure colours. Laser light differs drastically from all other light sources, man-made or natural, in one basic way which leads to several startling characteristics.
Laser light can be coherent light.
Ideally, this means that the light being emitted by the laser is of the same wavelength, and is in phase.