reinforce or cancel one another depending of factors such as magnitude and direction. Unbalanced forces will cause changes in the direction or speed of an object. Electromagnetism is composed of magnetic fields and electric currents. The electromagnetic spectrum is mediated by a particle called photon. Example: heat‚ visible light‚ radio waves‚ X-rays‚ UV radiation.
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households and has served to be as important as a mobile phone or an ATM (SMECC‚ n.d.). The microwave energy used in the microwave oven to heat up the particles in the food. Microwaves are a type of electromagnetic waves that place between radio waves and microwaves on the electromagnetic spectrum. The longer the wavelengths‚ the lower the energy frequency. A typical microwave oven has a wave frequency of 2‚ 450 megahertz (M. Brian‚ 2000). Water‚ sugar and fats only absorb waves in this frequency
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Power Satellite (SPS) (Second Draft by N. Shinohara) 1. Theoretical Background It is known that electromagnetic energy also associated with the propagation of the electromagnetic waves. We can use theoretically all electromagnetic waves for a wireless power transmission (WPT). The difference between the WPT and communication systems is only efficiency. The Maxwell’s Equations indicate that the electromagnetic field and its power diffuse to all directions. Although we transmit the energy in the communication
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Danger of ionising radiation Non ionizing radiation refers to any type of electromagnetic radiation that does not carry enough energy per quantum to ionize atoms or molecules—that is‚ to completely remove an electron from an atom or molecule. Instead of producing charged ions when passing through matter‚ the electromagnetic radiation has sufficient energy only for excitation‚ the movement of an electron to a higher energy state. Ionizing (or ionising) radiation
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Students with Autism Spectrum Disorder & its Relationship to Academic Instruction Tonya Trepinski Baylor University Introduction As a teacher in the public school system for ten years‚ this researcher has had the privilege of working with students with special needs‚ in particular‚ with students on the autism spectrum. While in the classroom‚ she has observed a disturbing trend that students on the autism spectrum are not being given the
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Lens Antenna an antenna whose directivity pattern is a result of the difference between the phase velocity of propagation of an electromagnetic wave in air and that in the lens material. Lens antennas are used in radar and metering equipment that operates in the centimeter wavelength range. A lens antenna consists of a lens proper and of a feed. The shape of the lens depends on the refractive index n (the ratio of the phase velocity of propagation of a radio wave in a vacuum to that in the lens)
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Antennas & Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or system of conductors o Transmission - radiates electromagnetic energy into space o Reception - collects electromagnetic energy from space In two-way communication‚ the same antenna can be used for transmission and reception Radiation Patterns Radiation pattern o Graphical representation of radiation properties of an antenna o Depicted as two-dimensional
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scientific marvels far better and more accurately than watching an episode of Star Trek or reading a Superman comic. First and most important is to analyze why an X-ray works and what it is. These “rays” are high energy‚ low wavelength beams of electromagnetic energy – very similar to the light we can see; only they are completely invisible to us because our eyes lack the ability to detect its wavelength. They are produced by the movement of electrons in atoms. Electrons exist in constant orbit around
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OCT‚ 2013 WIRELESS TRANSMISSION 1.2 RADIO PROPAGATION: Radio propagation is the behavior of radio waves when they are transmitted‚ or propagated from one point on the Earth to another‚ or into various parts of the atmosphere. As a form of electromagnetic radiation‚ like light waves‚ radio waves are affected by the phenomena of reflection‚ diffraction‚ and scattering. ERIC SAVIOUR ARYEE OKAI‚ OCT‚ 2013 ASSIGNMENT #1 With the aid of simple diagram(s)‚ explain the three propagation phenomena
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An adventure into Astronomy Late at night I like to go into my backyard with a telescope and look at the stars that far away in the night sky. The view of thousands of stars feeds me with wonder and amazement about both the stars origins‚ and what treasures they may hold floating around them. All life needs a host star to form around‚ and all life comes from the ashes of these once glorious masses of gas. Astronomy offers us a great view of the universe around us‚ you can join me and others‚
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