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| Electricity and Magnetism |
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We find the applications of Electricity and Magnetism in various fields such as power generation and Telecommunications. Electricity and magnetism are two aspects of the same force. Electromagnetic theory ties together such broad phenomena such as electrical energy transmitted at frequencies as low as 50 hertz, electronics, high frequency radio waves and light. The many facets of electromagnetics are due to how waves behave at different frequencies and how materials react in different ways to waves of different frequency.
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| Communication satellites are so much a part of every day life that we use them without realizing it. They relay radio, television, telephone and data signals from one part of the Earth to another through electromagnetic waves at different frequencies. Navigation satellites transmit radio signals that enable navigators to determine their position. Global Positioning System (GPS) uses satellites in this way. Many mobile telephone networks use electromagnetic waves at microwave frequencies to transmit and receive signals with in small areas called cells. |
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