The Cosmic Microwave Background Radiation Perhaps the most conclusive (and certainly among the most carefully examined) piece of evidence for the Big Bang is the existence of an isotropic radiation bath that permeates the entire Universe known as the "cosmic microwave background" (CMB). The word "isotropic" means the same in all directions; the degree of anisotropy of the CMB is about one part in a thousand. In 1965‚ two young radio astronomers‚ Arno Penzias and Robert Wilson‚ almost accidentally
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Cell Tower Radiation on Human Body Neha Kumar (Director‚ WILCOM Technologies Pvt. Ltd.) Prof. Girish Kumar (I.I.T Bombay) ISMOT- 2009 OBJECTIVE Radiation measurements near the cell towers EMF exposure Safety norms Review Biological effects (far below current standards) Radiation Shield (reduce Radiation levels) Electromagnetic Radiations Radiation emitted from Cell Phones‚ Cell phone towers‚ Wi-Fi‚ TV and FM towers‚ microwave ovens‚ etc are called Electromagnetic radiations and are known
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Chapter 2 Review of Related Literature Electromagnetic is one branch of physics. It was concerned with magnetism produced by electric currents and with the interaction of electric and magnetic fields. Electromagnetism is defined the interaction between a magnetic field and an electric field. People use electromagnetic to transmit electricity to other place‚ to supply electricity form magnetic fields and to store and conserve energy. Electromagnet has components of strong interaction‚ weak interaction
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The electromagnetic spectrum (EM Spectrum) is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes. The different types of EM radiation that make up the electromagnetic spectrum are microwaves‚ infrared light ‚ ultraviolet light‚ radar‚ visible light‚ radio‚ x-rays and gamma-rays. Radio: Radio waves given out by radio stations. They are also given out stars and gases in space. Microwave: Microwave radiation will cook scrambled eggs‚ but is also
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simulations show that a combined use of textiles with the right properties as a shield provides great possibilities for reduction of the RF effects over the human body. This can be proved from the results obtained at probe 1 which estimate the amount of RF radiation below the skin layer‚ are showing that the average SAR level with all kinds of shielding materials is ≥ 400 % lower than in the case without shielding (in the case with both shielding materials the reduction is > 300 times in the strength of the
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Two Examples of Radiation 1. Boundaries A discussion of the regions (or bands or types) of the electromagnetic spectrum is given below. Note that there are no precisely defined boundaries between the bands of the electromagnetic spectrum; rather
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Should We Use Electromagnetic Waves For Medical Purposes? Farah Labita 10A Electromagnetic waves are waves or periodic disturbances that do not need a medium to travel‚ unlike mechanical waves that do require a medium (solid‚ liquid or gas). Electromagnetic waves travel through vacuum and are caused by changes in electric and magnetic fields. Accelerating a charge creates electromagnetic waves and it travels at different waves and spans in a very broad spectrum. This wide spectrum of wavelengths
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Ideas about the solar system Our understanding of the solar system has changed over many centuries. Scientists such as Ptolemy‚ Copernicus and Galileo added their ideas to our changing understanding. We observe the universe using a variety of equipment‚ from telescopes to orbiters and landers. Models of the solar system The planets and the Sun orbit the Earth in Ptolemy’s model. Our understanding of the universe has changed over time. Different civilisations have created different models to
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1. What is the name for all the electromagnetic waves that exist? Names of the electromagnetic waves that exist are Gamma Rays‚ X-Rays‚ Ultraviolet Waves‚ Visible Light‚ Microwaves‚ and Radio Waves. 2. What are electromagnetic waves produced from? What two things do they have? Electromagnetic waves are produced by the vibration of charged particles and have electrical and magnetic properties. 3. What is the name for the section of the electromagnetic spectrum that we can see with our
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Electromagnetic spectrum The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.[4] The "electromagnetic spectrum" of an object has a different meaning‚ and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. The electromagnetic spectrum extends from below the low frequencies used for modern radio communication to gamma radiation at the short-wavelength (high-frequency) end‚ thereby covering
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