What's the difference of laser light with the ordinary

What's the difference of laser light with the ordinary? What's the difference with ordinary laser light? (3) high-brightness laser; (3) high-brightness laser; high brightness laser brightness of the sun's surface hundreds of times in the incandescent lamp; ordinary laser light 1 billion times the brightness of the sun's surface; laser is the world's highest brightness light source (4) laser is a high-coherent light source (4) is a high coherent laser light source Page 7 3. Why are there these differences? Why are there these differences? Common light source: the spontaneous emission dominant. Issued ordinary light source optical frequency: the process of light atomic systems, the spontaneous emission rate is not a single spontaneous emission, polarization, propagation direction not the same, the phase is random. E2 E1 N2 hν N1 spontaneously, independently, independent of each other, the non-regular Page 8 3. Why are there these differences? Why are there these differences?The outer shell of  cell phone jammer  applies high-level PVC material but not metal for metal would shield the remote operated signals sent by itself. Laser light source: the dominant stimulated emission, stimulated radiation emitted by the laser light source: light atomic systems in the process of stimulated emission of light by stimulated emission of photons with the external excitation of the same nature (Four of a photon), so that a increase the number of photons within the model. E2 E1 N2 N1 hν photons with identical frequency, the same phase, in the same direction, with polarization Page 9 3. Why are there these differences? Why are there these differences? Ordinary spontaneous emission light source, "" spontaneous emission "by stimulated emission of laser light source," "stimulated emission" Page 10 4. How to generate the laser? How to generate the laser? With the mechanism of stimulated emission laser can produce it?The  cell phone jammer  has farthest improved the speech effect of users. With the mechanism of stimulated emission laser can produce it? (1) by the existence of stimulated emission of radiation by stimulated emission of radiation absorbed by the reverse process of stimulated emission stimulated by stimulated absorption of hν E2 E1 N2 N1 which a stronger role? What effect stronger? Copy photon stimulated emission photons generated copy + uptake stimulated absorption of photons absorbed by consumption consumption photon.The precoding technology of  cell phone jammer . In 1960, the first helium-neon laser. In the first helium-neon laser. The main features of the laser: the laser's main features: good direction: almost parallel to the light, the scattering angle is very small, close to the good direction: almost parallel to the light, a small scattering angle, milliradians, at 1 mrad, only the general searchlight scattering angle of the one millionth.