12-12-2012, 03:03 PM
ELECTROMAGNETIC WAVE
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INTRODUCTION
When we tune our radio, watch tv, send a text message, or pop popcorn in a microwave oven, weare using electromagnetic wave. we depend on this energy every hour of every day. Without it, the world we know could not exist.
According to putter, et al( 2009),The electric energy of the moving electrons produces the energy of the electric field, which produces the energy of the magnetic field, which produces the energy of the magnet. The energy of the electric and magnetic fields is in the form of an electromagnetic wave. This electromagnetic wave travels at the speed of light.
Pradeep, et al (2001), viewed that similar kind of EM wave introduction. Electromagnetic wave is an energy wave produced from an electrical discharge. Electromagnetic waves have rise and fall cycles. The number of rise and fall cycles per second is its frequency. We can’t see or feel them, but they are around us.
Based on above researchAn electromagnetic wave can be created by accelerating charges; moving charges back and forth will produce oscillating electric and magnetic fields, and these travel at the speed of light.
Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays. The human eye can only detect only a small portion of this spectrum called visible light. A radio detects a different portion of the spectrum, and an x-ray machine uses yet another portion. NASA's scientific instruments use the full range of the electromagnetic spectrum to study the Earth, the solar system, and the universe beyond.