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Description Of The Related Characteristics Of Laser Light Jul 06, 2017

    The original Chinese name Laser is "laser", "Dreiser", is its English names of the laser transliteration, is taken from the English light amplification by stimulated emission of radiation of the words of the first a letters of the acronym. It means "the light expands through stimulated radiation." The English full name of the laser has fully expressed the main process of laser fabrication, which was discovered by the famous American physicist Albert Einstein in the early 1916. 1964    According to China's famous scientist Qian Xuesen suggested that "light stimulated radiation" renamed "Laser." Laser applications are widely used, mainly laser marking, laser welding, laser cutting, optical communication, laser spectrum, laser ranging, laser radar, laser weapons, laser recordings, laser indicators, laser vision, laser beauty, laser scanning, laser anti-mosquito and so on.Laser Light
   The interaction between light and matter is essentially a microscopic particle that absorbs or radiates photons and changes the performance of its own motion.  Microscopic particles have a specific set of energy levels (usually the energy levels are discrete). At any moment the particle can only be in a state corresponding to a certain level (or simply expressed as being at a certain level). When interacting with photons, the particles jump from one level to another and absorb or radiate photons accordingly. The energy of the photon is the difference between the energy of the two energy levels and the frequency is ν= e/h (H is Planck constant).Laser Light
    The excited state that the particle is excited to enter is not a stable state of the particle, such as a lower energy level in which the particles can be accepted, even if there is no external effect, the particle also has a certain probability, spontaneously from the high-energy level excited state (E2) to the low energy level ground (E1) to jump, while radiating energy (e2-e1) of the photon, photon frequency ν= (E2-E1)/h. This radiation process is called spontaneous radiation. The light emitted by many atoms in spontaneous radiation does not have the same phase, polarization, and direction of propagation as the incoherent light that is physically said.Laser Light