Uses of Electromagnetic Waves Radio Waves * TV and FM radio (short wavelength) * Direct line of sight with transmitter (do not diffract) * Medium wavelength – travel further because they reflect from layers in the atmosphere * Used for transmitting signals. Microwaves * Microwaves are used in satellite television broad casting. * It is used to transmit mobile phone signals between Mast‚ which may be up to 20km apart. * Microwaves are absorbed by water molecules
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•Explain how the radiating electric field (or electromagnetic signal) is produced when radio stations broadcast. A radio wave (radiating electric field) propagates out from the source‚ traveling at the speed of light. The source‚ for example an antenna‚ creates oscillating electric(E)/ magnetic(B) fields. These fields are perpendicular not only to each other but to the direction of the traveling wave‚ and travel away from the antenna. The electromagnetic wave is‚ therefore‚ a transverse wave. The electric/
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What exactly is the electromagnetic spectrum? Is a continuous range of wavelengths‚ which includes gamma rays‚ ultraviolet waves and other forms of electromagnetic radiation. How does the issue of scarcity and interference relate to the electromagnetic spectrum? The spectrum is considered scarce because of the limited number of frequencies for operation and two parties cannot broadcast on the same frequency in the spectrum. Interference not only can be caused by broadcasters but by natural phenomenons
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Name __________________ Blackbody Radiation Lab 11 Go to http://phet.colorado.edu/simulations/sims.php?sim=Blackbody_Spectrum and click on Run Now. 1) In this lab‚ you will use the Blackbody Spectrum Simulation to investigate how the spectrum of electromagnetic radiation emitted by objects is affected by the object’s temperature. In this simulation‚ you can input the temperature and observe the spectrum of the radiation emitted. a) The temperature of stars in the universe
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Radiation pattern From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Antenna radiation patterns In the field of antenna design the term ’radiation pattern ’ most commonly refers to the directional (angular) dependence of radiation from the antenna or other source (synonyms: antenna pattern‚ far-field pattern).[1][2][3] Particularly in the fields of fiber optics‚ lasers‚ and integrated optics‚ the term radiation pattern‚ or near-field radiation pattern‚ may also be used as
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of Computer Radiation in the Health of I-BSN-2 Students of Cavite State University I. Introduction Nowadays‚ computers are very common in a household. Computers are very advantageous which actually has unlimited capabilities; in seeking a certain information‚ for recreation‚ for entertainment purposes and many other uses. But despite those infinite uses of computers‚ some say that computers cause detrimental effects to those who are exposed to its radiation. Radiation‚ in Physics
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the absorption of heat in white‚ black and silver will be explored. Infrared radiation is invisible radiant energy‚ it lies between the visible light and the microwave portion of the electromagnetic spectrum. Heat is the main source of infrared energy‚ heat is produced by the movement of atoms and molecules. This experiment was conducted to investigate how black‚ white‚ and silver cans would absorb heat. The electromagnetic spectrum is made up of gamma rays‚ X-rays‚ ultraviolet‚ visible‚ infrared‚
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Answer: Radiation has a profound effect on matter. Particularly in forms where it has high energy. There are basically two kinds of radiation‚ and they are electromagnetic energy and particulate radiation. Low energy electromagnetic radiation isn’t generally hazardous‚ as long as the field strengths are low. You wouldn’t want to stand in front of a radar antenna when it’s radiating‚ but we are swept by low power electromagnet energy all the time. Those so-called radio waves are everywhere. Light
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Radioactivity computer research: Instructions and Questions [Note: Links to Bitesize websites may direct you to a ‘home’ page for Radiation and the Universe- click ‘Activity’ for Radioactive Substances and scroll through until you find the appropriate page] 1) Go to http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/radiation/radiocativerev1.shtml . What is an isotope? How many isotopes of hydrogen are there? An isotope is an atoms which are from the same element but have different numbers
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When solid objects are heated‚ they emit radiation. At normal temperature‚ we are not aware of this radiation because the intensity is low. At higher temperatures‚ there is sufficient infrared radiation that we can feel the "heat" if we are close to them. At even higher temperature‚ the objects actually glow‚ like the heating element of toaster or red-hot electric stove burner. Since they are radiating energy‚ there must be a rate at which they are radiating. They may radiate 10 Joules per second
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