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The Electromagnetic Spectrum
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- Words:
- 731
- Submitted:
- Thu Jul 11 2002
... The Electromagnetic Spectrum The Electromagnetic spectrum is made up from several different types of wave. These are: Long wavelengths RADIO WAVES Long wave radio Medium wave radio Short wave radio MICROWAVES INFARED LIGHT RAYS VISABLE LIGHT RAYS Red Orange Yellow Green Blue Indigo Violet ULTRAVIOLET LIGHT RAYS X-RAYS Short wavelengths GAMMA RAYS Radio waves have the longest wavelengths of the spectrum, and the most varied. Some long wave radio waves can have wavelengths kilometres long, whilst some short wave ones can only be centimetres long. These waves are mainly used in communications - all radio and terrestrial TV stations use radio waves in some way. Microwaves are most commonly known for their use in microwave ovens, but they are also used for communications, satellites and many other things. The microwaves have quite short wavelengths, so they are easily absorbed by water. In a microwave oven, the waves are absorbed by the water in the food, and their
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