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The Impact Of The Lasers Technology On Society

972 words - 4 pages

Introduction:The name LASER is an acronym for Light Amplification by the Stimulated Emission of Radiation. In 1917, Albert Einstein first theorized about the process which makes lasers possible called "Stimulated Emission." In this paper, we can view the impact of the lasers technology on society from four perspectives: the strength, the weakness, the opportunity and the threat of Lasers Applications. To sum up, we will focus on the future of Lasers on society, assessing the real value of the Lasers technology.The strengths:Lasers, broadly speaking, are devices that generate or amplify light, just as transistors generate and amplify electronic signals at audio, radio or microwave frequencies. Since laser light can be focused to a very small point of light, lasers are used in CD players, in surgery, in communication, in welding, in cutting, in spectroscopy and in printing industry.Looking at the advantage of the laser, we can find that there are four characteristic of laser light. Comparing with the other conventional technologies, one of the most frequently used characteristic of laser technology is that of coherent. That is, the emitted light waves are in phase with one another and are so nearly parallel that they can travel for long distances without spreading. Here light must be understand broadly, since lasers have covered radiation at wavelengths ranging from infrared range to ultraviolet and even soft x-ray range.Take surgery as an example, when light is focused, the point of focus can become hot enough to burn the skin or human tissue, if the intensity of the light is great enough. This characteristic can be used to perform surgery that results in less damage than it a knife or scalpel was used.Another example of this may be given. Focusing a very high energy laser beam on a piece of metal can actually melt the metal. Equipment using high energy lasers are used in industry to accurately cut and weld sheets of metal.As for surveying, everyone has seen laser pointers that will shine a narrow beam across the room. Other devices that use this characteristic are laser range-finders, price scanners, surveying equipment and laser weapons.The laser has contributed to humanity as a powerful scientific tool for expanding human knowledge and in its many applications that help people directly.Weaknesses:Although there are lots of advantages of the lasers, we could identify the pitfall of the lasers. The laser beams could easily be adversely affected by atmospheric conditions, such as rain, fog, low clouds, and objects in the air, such a birds.Scientists and engineers suggested a number of novel schemes to protect the light from interference, including shielding it in metal tubes and using specially designed mirrors and thermal gas lenses to navigate around bends.Moreover, the laser is a kind of dangerous rays, when one dealing with lasers, because they can injure your eyes. Since a laser beam focuses to a point that can get very hot, a beam shined in...

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