“Light Amplification by Simulated Emission of Radiation” LASER in short, its an electronic device that emits an extremely intense beam of energy in a form of light rays. The laser function on the same basic principle as its forerunner, the maser and is sometimes referred as an optical maser. In both device, atoms had their energy increased are simulated, causing them to release this excess energy.
Lasers lights differs from that emitted by conventional sources, such as a tungsten-filament electric lamp, in two important ways. The first of this is that the laser light is spatially coherent; that i, the crest and trough of each light wave in the bean coincide with those of every other light wave. All other light sources produce incoherent light or light in which the crest and troughs of the waves do not coincide.
Laser light is monochromatic or of a single color; that is, all the light wave in the beam have the same wavelength. Almost all conventional light source emit lights that is a mixture of wavelength, or colors, and as the result the light appears white.
Because of this features, laser offers a mean of promoting the growth of undeveloped region of physics (primarily optics), photography, communications, ranging, surveying, nuclear fusion, medicine, chemistry and the fabrication of metal and ceramics. The widest application of lasers to date is in the laboratories of scientific tools. The laser’s high intensity and monochromaticity provides significant advantage for such scientific fields as non linear optics, plasma diagnostic, schlienren photography, raman spectroscopy, metrology and interferometry, siesmology and solar simulation.
The technology of lasers are now developing in much higher rate. A single laser beam can now carry thousand of radio, television and telephone signals simultaneously, they are now used as the primary communication medium.
Laser technology is also used in medicine to treat retinal detachment. If a retina, a light sensitive tissue at the back of the eye, when tears loosed from the eyeball, blindness may result. When a laser beam is focused through the lens of the eye, the intense burning rays cause scar to the tissues to form at the point of separations, reattaching the retina by fusing it to the underlying tissues. Conventional surgical methods requires several hours to do this, but with the laser technology, it can only take a few seconds to weld the detached retina.
Laser is a technology that i consider a peace of tool with much greater use. And upon its growth, we all benefits.