... device improved the lives of the people when it was invented as well, and how different our world would be had the laser not been invented. The word laser is an acronym for Light Amplified by Stimulated Emission of Radiation. The theory of stimulated emission was proposed in 1917 by Albert ... Einstein but it was not until the 1950's that this theory was applied to produce the laser. In 1954, Charles Townes and Arthur Schawlow invented the maser or microwave amplification by stimulated emission of radiation, using ammonia gas and microwave radiation. ... used to amplify radio signals and...

• Word Count: 556
• Approx Pages: 2

... glasses or contact lenses are uncomfortable and inconvenient while sailing. In the recent years medical technology has offered a great alternative for people like him, laser surgery. It uses a florescent beam to shave the cornea into a shape that better focuses light. Using local anesthesia the surgeon shaves a thin ... drive without glasses the next day. The surgery is not without risks but the most important, blindness, is virtually nonexistent. More than 1 million laser surgeries have been performed worldwide and none of them has resulted in blindness. The possibility of serious compl...

• Word Count: 653
• Approx Pages: 3
• Has Bibliography
• Grade Level: High School

... . While they are all dedicated to the same task, reading a bar code, each scanner type offers both advantages and disadvantages, and none is clearly superior in all cases. Hand held laser scanners are the most expensive of the scanning devices, but offer the largest depth of field making them an appropriate choice for a wide variety of non-contact applications. Hand held ... laser scanners use a laser diode to create a scan line by projecting a beam of energy off a rotating prism or oscillating mirror. The beam is reflected out the scanner window onto the bar code, where ... of light is...

• Word Count: 1068
• Approx Pages: 4
• Grade Level: High School

... is the job of the tracking system. The tracking system, as it plays the CD, has to continually move the laser outward. As the laser moves outward from the center of the disc, the bumps move past the laser faster -- this happens because the linear, or tangential, speed of the bumps is equal to the radius times the ... speed at which the disc is revolving (rpm). Therefore, as the laser moves outward, the spindle motor must slow the speed of the CD. That way, the bumps travel past the laser at a constant speed, and the data comes off the disc at a constant rate. A CD can store ... more da...

• Word Count: 1071
• Approx Pages: 4
• Grade Level: High School

... which lasers were thought to have application. Increasing telephone use, electronic transmission, relaying of television signals, and the need for communication in space all contributed to the emphasis placed on laser technology toward communications. The initial attraction to lasers for communications came from the fact that the amount of coherent information that an electromagnetic wave can carry if proportional to its ... Keratomileusis. This literally means, to shape the cornea within, using laser. For example Nearsightedness or myopia occurs when light rays entering the eye are foc...

• Word Count: 883
• Approx Pages: 4
• Grade Level: High School

... average output power, new wavelength bands, maximum peak pulse energy and minimum output pulse duration. Types of Lasers and Operating Principles Gas Lasers The invention of the helium-neon laser contributed to the discovery of other gases rather than helium-neon that can amplify light coherently. Today, many lasers use different gases and these lasers perform various functions. Carbon ... sectors. We will look at the uses of the lasers with reference to an industry. In medical sector, lasers apply in bloodless surgery, kidney stone treatment, eye treatment and laser healing. In the indu...

• Word Count: 1107
• Approx Pages: 4
• Has Bibliography

... ways. In this paper you will learn about the life of William D. Phillips, and his major achievements. You will learn how they cooled and trapped a laser's atoms, to make it possible to shoot one. William D. Phillips was born November 5th, 1948, in the town of Wilkes-Barre in the state of ... were "commercially"(4) available to own, eventually a few made their way to Phillip's lab. Because of Bills interest in lasers he decided to study the collisions of laser-excited atoms. Excitedly, he wrote up both experiments for his thesis, which he defended in 1976. After his write-ups, he continu...

• Word Count: 1023
• Approx Pages: 4
• Grade Level: High School

... When this happens a small amount of light is created in a quarts tube filled with typically argon gas. The argon gas is what gives a laser its red color in a laser pointer. This tiny sparks makes light, which is in the form of ions. Ions make up all light in the universe. These ions scatter ... to the two sides of the quarts tube. Next the ion enters in an atom of the argon gas, which is the start of the actual laser existence. When the ion enters the atom it picks up a second ion and exits the atom traveling in perfect sink wavelength making an increased strength ... like the second i...

• Word Count: 662
• Approx Pages: 3
• Grade Level: High School

... is time to burn the CD, also known as to copy onto the CD. When you burn a CD what is actually happening is there is a laser inside of the machine that will copy the music. The laser starts at the beginning of the blank CD and moves at the same pace in a spinning motion around the entire disk until all of the ... tracks are recorded. This laser also known as the "write laser" alters the surface of the CD where as the "read laser" does not. The write laser is much more powerful than the read laser, because it has to alter the disk by "burning", as the write laser does not it only has to ...

• Word Count: 710
• Approx Pages: 3
• Grade Level: High School

... to the eyeball. This LASIK surgical procedure requires no stitches allowing the eye to naturally heal itself (Basic Lasik). Surgeons who are trained specifically for this precise procedure perform the laser eye surgery. LASIK surgery can benefit people with farsightedness, nearsightedness, and astigmatism. Surgery results can range from satisfactory to excellent and many people's lives are vastly improved because they no ... longer have the burden of contact lenses or reading glasses (It's Your Health). The benefits of having LASIK laser eye surgery compared to PRK (Photo Refractive Ker...

• Word Count: 603
• Approx Pages: 2
• Grade Level: Undergraduate

... elevator that climbs at an average speed of 9 mph straight up a cable. 9 mph, that is not so fast but it is a significant breakthrough in the energy and laser technology that powers space elevators. Laser elevators are the first step in the scientific community to producing a elevator that can support large weights and make the sixty thousand mile voyage into space with out ... rockets or "hyperdrives." Space elevators are propelled by laser energy that is transmitted from a ground unit up to the elevator platform as it travels. The energy is accepted by a receiver which converts the en...

• Word Count: 529
• Approx Pages: 2
• Has Bibliography
• Grade Level: Undergraduate

... transfer bone, tissue, fat and muscle with this procedure. This surgery would be used on a relentlessly disfigured or injured person. There are several different types of flaps used for surgery. Laser surgery is performed on patients who have growths. This type of surgery provides minimal bleeding, bruising and scarring and will diminish the growth ... . Laser surgery can be used on infants with red birthmarks. The laser lightens the birthmark to where it isn't very noticeable. Laser surgery is used with the removal of warts. Here the laser cuts the tissue and seals the blood vessel at o...

• Word Count: 851
• Approx Pages: 3
• Grade Level: High School

... is called the reference beam. The signal beam is made to reflect off an object and hit a photographic film. Here, it meets the reference beam, which travels directly from the laser. The two beams interfere and a dark and light pattern is produced on the photographic film. Hence, a hologram is created. To display the hologram image, the reference beam is made to ... data stored/read in this form? Holographic computer storage works on a similar principle to the way a hologram is created. The two beams of light are made using a blue-green argon laser. The storage medium in this case is a p...

• Word Count: 1161
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School

... bundle, remaking the image, which can be observed through a magnifying glass. Image transmission by optical fibers is used a lot in medical instruments for looking inside the human body and for laser surgery, in copying machines, in computer graphics, and in many other machines. Optical fibers are also being used in sensing devices, ranging from thermometers to gyroscopes. The fibers can be ... really useful where electrical effects could make ordinary wiring useless, less accurate, or even hazardous. Fibers have also been developed to carry high-power laser beams for cutting and drilli...

• Word Count: 256
• Approx Pages: 1

Article: University Of Cincinnati Engineers Find New Method for Detecting Cracks In Aging Aircraft Parts Yan and Nagy combined there laser and ultrasound once there committed it there were looking for cracks in the outside of an airplanes outer hull. The researchers tested their method using a series of aluminum and other ... been use is aluminum, still with the aluminum torn apart, because of the softness of the material, While traditional stamping can stretch most aluminum alloys to 30 percent of their length before tearing apart. "Manufacturers could take about half the weight out of an a...

• Word Count: 574
• Approx Pages: 2

... in the field of solid-state masers for Bell Labs in 1956 after conceiving the idea of the maser in 1951. In 1957 he began working with Arthur Schawlow on a laser project that would operate at wavelengths a thousand times shorter than the maser. He worked with a colleague at the Massachusetts Institute of Technology, Ali Javan, experimenting with some equipment that tested ... invention has made great impact in radar, communications, astronomy, navigation, surgery, atomic clocks and industry. For all his hard work and achievement, Townes received a patent for his invention of the laser i...

• Word Count: 252
• Approx Pages: 1
• Grade Level: High School

... . This development was suitable for medical purposes because it had a light loss of one decibel per meter, which did evolved to make the laparoscopic surgery device. The invention of the laser in the 1960's developed by Theodore Maiman embarked a widespread interest in optical systems for data communications. It prompted researchers to study the potential of fiber optics for data communications, sensing ... , and other applications. Laser systems could send a much larger amount of data than telephone, microwave, and other electrical systems. Laser was very important to advancing fiber opt...

• Word Count: 788
• Approx Pages: 3
• Grade Level: Undergraduate

... optically polished at their ends, can be used to transmit images. Image transmission by optical fibers is widely used in medical instruments for viewing inside the human body and for laser surgery, in facsimile systems, in phototypesetting, in computer graphics, and in many other applications. Optical fibers are also being used in a wide variety of sensing devices, ranging from thermometers to ... gyroscopes. The potential of their applications in this field is nearly unlimited. Fibers have also been developed to carry high-power laser beams for cutting and drilling. One of the most imp...

• Word Count: 697
• Approx Pages: 3
• Has Bibliography

... make power, but the military use it also in weapons. The army also use other inventions like infra-red-photography or the laser technology for their machinations. But these technologies are also need for the civil use. For example with a laser it is able to make fast and efficient surgeries. One of the most important inventions is the computer. He is a part ... ...

• Word Count: 658
• Approx Pages: 3
• Grade Level: High School

... room and what seems like a wire to go with every inch of your screen. After a few hours of reading directions and connecting all the wires, cables, antennas, and laser beams (okay, maybe not laser beams) you're ready to watch a movie in the comfort of your home at an affordable cost that you can pause, rewind, stop, play, and have amazing theater ... ...

• Word Count: 1025
• Approx Pages: 4
• Grade Level: High School

... to use lasers for surgery. Lasers are based on the physical principle of light, and are devices for the creation and amplification of a narrow, intense beam of coherent light. New laser microsurgery can actually alter the shape of the cornea in the eye so the patient's eyesight can return to normal, and he/she will no longer need those bothersome glasses ... ...

• Word Count: 486
• Approx Pages: 2
• Grade Level: High School

... to use lasers for surgery. Lasers are based on the physical principle of light, and are devices for the creation and amplification of a narrow, intense beam of coherent light. New laser microsurgery can actually alter the shape of the cornea in the eye so the patient's eyesight can return to normal, and he/she will no longer need those bothersome glasses ... ...

• Word Count: 493
• Approx Pages: 2
• Has Bibliography
• Grade Level: High School

RHETORIC AND ETHICS The debate that I watched was defiantly something that could touch on an ethical issue. They were proposing a research strategy to make a laser that would be able to shoot missals out of the air if we were to go to war anytime soon. The thing is, is war even ethical? I cannot answer that ... ...

• Word Count: 747
• Approx Pages: 3
• Grade Level: High School

... term. Scientific discovery is often implemented before society understands the results of the new idea. Science advances at a rate faster than the understanding of the total consequences of a discovery. Asbestos, laser eye surgery, and now human cloning have demonstrated how discovery can lead to unanticipated results. The scientific breakthrough of giving birth to a human clone caught the world off guard. The ... ...

• Word Count: 607
• Approx Pages: 2
• Has Bibliography
• Grade Level: High School

1.Film Stress and Wafer Bow Measurement Systems. ( Room Temperature and High Temperatures - for Si or GaAs applications) We pioneered the optical lever (optilever) laser scanning technique for measuring film stress and wafer bow. Over 400 systems are installed worldwide. Our system is used routinely by fabs to monitor the film deposition process, which if ... ...

• Word Count: 359
• Approx Pages: 1