• Microwaves Radio Waves
    1,378 words
    Microwaves 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 ...
  • Rfid Bar Code
    787 words
    Radio frequency identification Radio frequency identification, or RFID, is a generic term for technologies that use radio waves to automatically identify people or objects. There are several methods of identification, but the most common is to store a serial number that identifies a person or object, and perhaps other information, on a microchip that is attached to an antenna (the chip and the antenna together are called an RFID transponder or an RFID tag). The antenna enables the chip to transm...
  • Electromagnetic Spectrum Light Radiation Radio
    1,370 words
    MCW U 6 PH 3 Kate Knights Summer 2000 Observing Stars 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, trav...
  • Rays Ultraviolet Light Waves Wavelength
    463 words
    In this universe there are many thing that we cannot explain. Among these many things is light. Light, as far as we know, come in different wavelengths and the size of the wavelength determine what type of light it is. The middle wavelength lights are what gives us the seven basic colors of red, orange, yellow, green, blue, indigo and violet. Beside these visible lights there are the lights that cannot be seen by the human eye. These invisible lights can be grouped into two other groups the lon...
  • Radio A Form Of Communication
    3,167 words
    Radio: A Form of CommunicationPhysicsIdoh GerstenMr. ZambiziPhysicsMarch 12, 1995 Radio is a form of communication in which intelligence is transmitted without wires from one point to another by means of electromagnetic waves. Early forms of communication over great distances were the telephone and the telegraph. They required wires between the sender and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation of energy from transmitting antenna in t...
  • Radio Waves Frequency Wave Audio
    580 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 t...
  • Crab Nebula Neutron Star
    1,191 words
    Crab Nebula Looking up at the night sky you see stars lying on a never-ending dark blanket. It is within this "blanket", called the interstellar medium, that new stars are formed. The interstellar medium consists of 99% gas and about 1% dust particles. Hydrogen is the predominant gas in both atomic and molecular forms. While being the place where stars are born, the interstellar medium also creates beautiful nebulae. A reflection nebula is created when light from a nearby star reflects from the...
  • Microwaves Narrow Beam
    1,406 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 ...
  • Electromagnetic Spectrum Radio Wave
    2,184 words
    The electromagnetic spectrum is made up of six different types of waves. Radio waves, Microwaves, Infrared waves, Visible light, Ultravioletlight, X-rays and Gamma rays. The radio waves are used to transmit radio and television signals. The infrared waves are used to tell temperature of areas. Visible light is all the colors that we can see. Ultravioletlight can help things grow but to much can cause diseases such as skin cancer. X-rays are used as a tool to find broken bones or take pitchers o...
  • Telescopes Secondary Mirror
    2,538 words
    TELESCOPE Light and other kinds of electromagnetic radiation coming from the universe outside the Earth must travel enormous distances through space and time to reach observers. Only the brightest and nearest stars can be seen with the unaided eye. To see farther and to clarify and measure what is seen, a telescope is needed. The word telescope is derived from the Greek words tele, "from afar," and skopos, "viewer." Even a simple homemade telescope can clearly show Saturn's rings, Jupiter's band...
  • Radio Waves Frequency Wave Amplitude
    836 words
    Radio Waves In the modern society, radio is the most widely used medium of broadcasting and electronic communication: it plays a major role in many areas such as public safety, industrial manufacturing, processing, agriculture, transportation, entertainment, national defense, space travel, overseas communication, news reporting and weather forecasting. In radio broadcasts, they use the radio waves which can be both microwaves and longer radio waves. These are transmitted in two ways: amplitude m...
  • Radio Imaging Effectiveness Half Life
    1,252 words
    Radiation can be used in both diagnosis and therapeutic manners. The radiation emitted from radioisotopes can destroy tissue and in the therapeutic use: the destruction of cancerous and other dangerous tissues. And with diagnosis the gamma particle pass through the body tissues with minimal damage to a gamma camera. To evaluate the effectiveness of PET, SPECT, MRI and X-rays, we first need some basic knowledge on how each of them work. PET stands for positron emission tomography and works by an ...
  • Radar In The Modern World
    2,323 words
    Scott Martin D. Hyland English 192 Research Paper Radar in the Modern World Radar is usually taken for granted in these days of modern technology. Many people do not know how radar is really used, how it works, or why we need it. People are familiar with several uses of radar like police enforcement radar guns and radar that measures how fast a baseball is pitched in a major league game. These are only a few of the many uses radar has to offer. Radar can determine several properties of an objec...
  • Radio Waves Frequency Wave Antenna
    717 words
    Before beginning our research on radio waves, to us, radio waves were just waves going through the atmosphere, carrying sound from one place to another. Those were our ignorant days! We did not realize the complicated terms and theories involved. In the following report you will see how we advanced in our knowledge of radio waves, and we hope it will do the same for you. Radio waves are a combination of two kinds of electric vibrations. Audio frequency waves, which represent voice and other soun...
  • Base Station Radio Mobile Waves
    1,081 words
    Jargon buster 2 G 2 G, the second generation or GSM, is the technology currently used in the operation of mobile phones. 3 G 3 G, or third generation, is the generic term used for the next generation of mobile communications systems. The new systems will enhance the services available today and offer multimedia and internet access and the ability to view video footage. The third generation technology used in the UK is called UMTS. These services operate at 2200 MHz. (2. 2 GHz). Aerial/Antenna A...
  • The Sociological Impact Of Cell Phone Use
    2,251 words
    Roughly 15 years ago a new product emerged onto the market. American consumers could now purchase and use telephones that would travel with them in their automobiles. However, these inventions were large, bulky, the size of a briefcase, and weighed roughly 10 pounds. Modern day Americans have found a place in their everyday lives for this once jaw-dropping invention. Americans have also demanded, and received, adjustments to these mobile telephones. Today it is possible to purchase mobile phone...
  • The Significant Invention Radio Waves
    978 words
    Introduction: There are many fascinating things about the universe and there are lots to learn from it too. Most of the discoveries in outer space were in our solar system and most of them were observed from the human eye aided by telescopes. Is it possible to observe objects from outer space using instruments other than the telescope? Fortunately, we are able to explore other parts of the electromagnetic spectrum using different kinds of observations such as the radio telescope, invented by Mr....