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Free research essays on topics related to: radio waves

23 results found, view free essays on page:

  • Electromagnetic Radiation Infrared Radiation
    1,377 words
    You might remember the heroic role that newly-invented radar played in the Second World War. People hailed it then as "Our Miracle Ally." But even in its earliest years, as it was helping win the war, radar proved to be more than an expert enemy locator. Radar technicians, doodling away in their idle moments, found that they could focus a radar beam on a marshmallow and toast it. They also popped popcorn with it. Such was the beginning of microwave cooking. The very same energy that warned the B...
    Free research essays on topics related to: water molecules, outer layer, infrared radiation, electromagnetic radiation, radio waves
  • Wireless Local Area Network Wlan
    1,780 words
    A wireless LAN (WLAN) is a flexible data communication system implemented as an extension to, or as an alternative for, a wired LAN within a building or campus. Using electromagnetic waves, WLANs transmit and receive data over the air, minimizing the need for wired connections. Thus, WLANs combine data connectivity with user mobility, and, through simplified configuration, enable movable LANs. Over the last seven years, WLANs have gained strong popularity in a number of vertical markets, includi...
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  • Speed Of Light Time Of Day
    1,333 words
    Our view of the sky at night is possible because of the emission and reflection of light. 'Light' is the better-known term for the electromagnetic spectrum, which includes waves in the visible, ultra-violet, infra-red, microwave, radio, X-ray and gamma-ray regions. The scale of the spectrum is so large that no region is distinct, several overlap each other. Each of these regions in the electromagnetic spectrum represent transverse waves, travelling as electrical and magnetic fields which interac...
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  • Radio Telescopes Radio Waves
    1,285 words
    ... copes Orbiting telescopes are used to observe the ultraviolet (UV), far infrared, and X-ray portions of the electromagnetic spectrum. The Infrared Astronomical Satellite, placed in orbit in 1983, carried a 22. 5 -inch infrared telescope. Because all matter emits infrared radiation if warm, technologists had to cool the telescope to near absolute zero with liquid helium so its internal heat radiation would not mask radiation it was collecting from deep space objects. Among its many discoverie...
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  • Radio Telescopes Radio Signals
    1,153 words
    SETI, or the Search for Extra-Terrestrial Intelligence, is the scientific search for signals, primarily radio signals, from outer space. It is based on the belief that we will hear extraterrestrials before we see. The organizations work has been going on ever since the 1960 s. The main tools the scientists / searchers use are radio telescopes and listening equipment. To understand this organization, one must first look at its rocky history, and its unique discoveries. The Beginning of SETI is re...
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  • 20 Th Century Neutron Stars
    1,393 words
    The 20 th century saw a great many new discoveries regarding celestial phenomena in the universe. One of these entities, which has only recently been encountered, is the Black Hole. These are formed when a star which has consumed all its fuel collapses in on itself, eventually turning into a black hole with infinite density and zero volume and an immensely powerful magnetic field. We are unable to see black holes even with the most powerful telescope, because their gravitational pull is so stron...
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  • Electronic Devices Ad Hoc
    1,251 words
    Bluetooth Technology Today computer technologies are rapidly developing, which allows millions of people around the globe to work faster and more conveniently. Bluetooth is the wireless networking initiative that is led by the worlds most advancing information technologies companies such as Ericsson, Intel, Nokia, IBM, Toshiba, Lucent and others. The creation of Bluetooth is a remarkable advance towards the development of new approaches in information technologies industry. Bluetooth was origina...
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  • Percent Per Year Brain Cancer
    870 words
    Cancer From Cell Phones By: Violent J. Young E-mail: Do cellular phones cause cancer? As I walk through the doors at Circuit City I look around at all the customers shopping throughout the store and wonder which one will ask the question first. I sell cellular phones, and many customers are concerned with getting cancer from the phones. In recent years, many scientists have conducted tests, which show that cell phones can cause cancer over a period of time. Many shows on television have talked a...
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  • Four Hundred Years Radio Waves
    782 words
    At the turn of the century, it was apparent that we, the human race, could no longer continue at the rate we were going. At several billion people, we were rapidly multiplying at an exponential rate. Scientists declared an international emergency because of drastic depletion of natural resources. It became obvious that in a few decades the continuation of the human way of life would be impossible if we did not find a solution to our problem. We needed more space for our species, and something wi...
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  • Alexander Graham Bell Bell Labs
    3,231 words
    In the golden summer before World War I, the inventions and discoveries of the late 19 th century transformed North American life. Automobiles shortened (or at least seemed to) the miles; airplanes fulfilled humanity s dream of mechanized flight. Electric light was now commonplace, and the telephone was rapidly building communication networks across the North American continent. But the two inventions that helped shape America as we know it are the telephone and the television. The inhabitants o...
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  • Tcp Ip Frequency Hopping
    2,239 words
    Been 1 TCP/IP AND THE FUTURE OF THE INTERNET OVER WIRELESS MEDIUM By Robert Been ISM 410 Fifteen Years ago computers were just an expensive typewriter, calculator, and entertainment center thrown together in one box. People transferred their tiny files with floppy disk. The computer itself seldom had a hard drive. It was an amazing feat to dial into a computer bulletin board, and talk to other users of systems. Networking computers was more or less unheard of. The only exception were mainframes ...
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  • Global Positioning System U S Military
    3,776 words
    As we enter the 21 st century, we are constantly being bombarded with new technologies. From the wireless community to operations that once took weeks to recover and now only take a day or so, our world will never be the same. Another technology that is revolutionizing the world we live in is the Global Positioning System or GPS. The first GPS satellite was called GPS Block I. Launched in 1978, it was a developmental satellite. Another nine Block I satellites were launched through 1988. GPS is t...
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  • Directly Or Indirectly Electromagnetic Waves
    1,231 words
    Our Idea Of Anything Is Our Idea Our Idea Of Anything Is Our Idea Of Its Sensible Effects? Charles Sanders Pierce. How Reliable Is Charles Sanders Pierce states that Our idea of anything is our idea of its sensible effects. In this paper, an attempt will be made to show the validity of this statement and to justify the exclusion of the imperceptible part of the outside world from our conception of it. For our purposes, we will set a persons mind and ideas apart form everything that goes on in th...
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  • Earths Surface Earths Atmosphere
    2,475 words
    Propagation as defined by Webster Dictionary as the phenomenon of radio frequency energy traveling through the earths atmosphere, as well as through the empty space above the atmosphere. Once radio-frequency energy has been emitted from an antenna it will travel away from the antenna, where it is generated from, at the speed of light. Once it is sent the wave exists and propagates independently of the system that produces it. This means that changes, which occur at the transmitter (antenna), wil...
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  • Radio Waves Light Waves
    335 words
    Radio astronomy uses radio waves to study regions of space. Radio waves are a form of electromagnetic radiation like visible light waves only with much longer wavelengths. Visible light waves are oscillating electromagnetic signals with wavelengths of less than one millionth of a metre, whereas radio waves have wavelengths in the range of a few millimetres to several metres. Radio telescopes gather and concentrate the radio waves from an astronomical source. The signal received is then electroni...
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  • Electromagnetic Waves Cellular Phones
    1,546 words
    Radio-wave technology is one of the most important technologies used by man. It has forever changed the United States and the world, and will continue to do so in the future. Radio has been a communications medium, a recreational device, and many other things to us. When British physicist James Clerk Maxwell published his theory of electromagnetic waves in 1873, he probably never could have envisioned the sorts of things that would come of such a principle (White). His theory mainly had to do wi...
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  • Compton Electromagnetic Waves
    1,525 words
    Radio-wave technology is one of the most important technologies used by man. It has forever changed the United States and the world, and will continue to do so in the future. Radio has been a communications medium, a recreational device, and many other things to us. When British physicist James Clerk Maxwell published his theory of electromagnetic waves in 1873, he probably never could have envisioned the sorts of things that would come of such a principle. His theory mainly had to do with light...
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  • Radio Waves Radio Frequency
    584 words
    Radio waves travel at 186, 000 miles per second through air. In contrast, sound waves travel at only 1 / 5 of a mile per second. If a modulation is made of the radio wave that exactly reproduces the amplitude and frequency characteristics of the original sound wave, then sound can be transmitted rapidly over long distances. This leads to a very interesting phenomena. During a live broadcast in New York, the music will reach listeners in California a fraction of a second before it can be heard by...
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  • M P H Black Hole
    3,742 words
    Black holes are objects so dense that not even light can escape their gravity, and since nothing can travel faster than light, nothing can escape from inside a black hole. Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Since our best theory of gravity at the moment is Einsteins general theory of relativity, we have to delve into some results of this theory to understand black ...
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  • Ultraviolet Radiation Carbon Dioxide
    1,154 words
    Horace and the Atmosphere Hey there! I don? t know who? s reading this, but have I got a story to tell you! My name is Horace and I? m a 5 billion-year-old rock. Now wait a minute! I know what you? re thinking, ? What a boring life. What does a rock know about anything? ? But don? t walk away yet. An old rock can know more than you think and I happen to have a pretty cool story to tell you. It? s all about the atmosphere. You know, that big mass of gases and air pressure extending over 100 kilom...
    Free research essays on topics related to: carbon dioxide, atmosphere, ultraviolet radiation, ozone layer, carbon monoxide

23 results found, view free essays on page:

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