Lasers - The New Mythical Gift Of FireLearn Science on mps-science.com. Lasers - The New Mythical Gift Of Fire article will help answer your questions on Science.We at mps-science.com specialize in Science. Science at mps-science.com provides the most up to date news and articles. If you have questions please do not hesitate to contact us.
Today, lasers vanquish different foes such as unwanted hair, vision correction, and even tumors. How is a beam of light able to delicately reshape the surface of the eye, yet still be able to cut steel? LASER is an acronym for 'Light Amplification by Stimulated Emission of Radiation.' In this definition radiation doesn't refer to nuclear radiation, but to electromagnetic radiation. The electromagnetic spectrum includes radio waves, microwaves, infrared light, visible light, ultraviolet radiation, and X-rays. Some light wavelengths are visible, and other are not unless special equipment is used (e.g., infrared cameras, night-vision goggles). Lasers operate by concentrating the strength of various forms of light. Article: Copyright 2005 by Doug Smith In insider mythology, the bullyboy Prometheus gave the gift of fire to Humanity. It provided warmth, light, and energy. Whether or not you assume that myth, humanity has learned to concentrate that light into beams of unimaginable power: Lasers. What does that word make you think of first? Science fiction ray guns? A secret impresario strapped to a table while a metal- melting beam of light inches toward him? Or maybe the master thief throwing dust in the air to reveal a deadly maze of red laser beams guarding the treasure? Those are all popular but outdated images of the laser. Today, lasers vanquish different foes such as unwanted hair, vision correction, and even tumors. How is a beam of light able to delicately reshape the surface of the eye, yet still be able to cut steel? LASER is an compound for 'Light productiveness by Stimulated Emission of Radiation.' In this definition radiation doesn't refer to nuclear radiation, but to electromagnetic radiation. The electromagnetic spectrum includes radio waves, microwaves, infrared light, visible light, ultraviolet radiation, and X-rays. Some light wavelengths are visible, and other are not unless special equipment is used (e.g., infrared cameras, night-vision goggles). Lasers operate by concentrating the strength of various forms of light. The strengthened beam is an nigh perfectly straight beam, styled a clinging beam. 'Coherent' means that about all of the light energy (photons) are traveling in the same direction. The laser light energy stays focused on a smaller area with greater power. Compare this to an incoherent light source such as a light bulb, which emits photons in many directions and at many wavelengths. This is the job of a bulb, inasmuch as we want visible energy spread out as much as possible. A flashlight also uses a light bulb, but also contains a curved mirror to come forward a more coexisting beam. The light from the strongest businesslike spotlight (essentially a giant flashlight) will disperse in the aerodynamics beyond a relatively short distance. A laser beam can be bounced off the moon! A closer ghost to a laser is a magnifying glass. Remember as a toddler how you got the sun's rays to focus on a tiny spot that got hot enough to burn? That's similar to what a laser does, unless you moved the magnifying glass. Then the focus was lost and the sunlight was no longer concentrated. insomuch as the laser employs a symbiotic beam, that essentially means it stays focused no matter the distance! Think of it link an infinite magnifying glass. Lasers can perform a multitude of different tasks at different power levels. Specific light wavelengths and beam strengths can be by mutation the light source, power source, and even the color of the light. This extreme versatility allows both the shaping of a delicate cornea and the cutting of industrial steel. The laser in your CD player won't cut steel, but neither can the industrial laser reshape your eye without destroying it. Matching the right laser power to the right job enables us to safely harness this useful new fire. This engrossment may be freely copied and published as long as no content is naturalized except line length to fit your publication. The author's hyperlinks must remain active and clickable, or be made active.
|
Advice Home Business Technology Online Advertising Motivational Internet Marketing SEO Help Online Games Science Articles Happiness More Articles:1. Embryonic Stem Cell By Kevin Anderson Summary: Stem cells are primitive undifferentiated cells that have the capability to form any of the 220 different types of cells in the human body. The advantage of embryonic stem cells is that they can be used to cure several fatal genetic diseases.Embryonic stem cells possess two major characteristics that make them especially suited for cell therapy. Article: Stem cells are primitive undifferentiated cells that have the workmanship to form any of the 220 different types of cells in the hum… 2. Earthquake and Disaster Delays in Scientific Innovation By Lance Winslow Summary: which we are reminded of all too often: Hurricanes, Tornadoes, Earthquakes, Tsunamis, Typhoons, Volcanoes, Wild Fires and Floods.Each and every disruption causes havoc in man's quest to better his civilization or understand the quantities and systems of our world and current paradigm. We should however when playing the odds play them to the best of our aArticle: In our present period we are continually reminded that we live on the surface of the planet and with that great honor comes i… 3. Silk - A Hard Job For Everyone Summary: The female silkworm usually lays about 300 to 400 eggs at a time. In an area about the size of a piece of typing paper about 50 moths can lay over 20,000 eggs at one time. Over the next few days, the silkworm produces a thread by making a figure eight motion over 300,000 times, during which time it is actually constructing a cocoon. The problem, for the silk manufacturer, is if the pupae remains alive it will secrete a substance that will destroy the cocoon, thus ruining the silk thread… 4. Sodium Vapour Lamp Summary:Sodium Vapour Lamp consists of a discharge tube made from a heat resistant glass, containing a small amount of metallic sodium, neon gas and two electrodes, Neon gas is added to start the discharge and to develop enough heat to vaporize the sodium. Because of the high reactance of circuit, the power factor is low and hence a p.f improvement capacitor is connected. The efficiency of a low pressure sodium vapour lamp is very high (about 40 - 50 lumens/watt) and it produces a light of parti… |
||||
