Electromagnetic+Spectrum


 * __ELECTROMAGNETIC SPECTRUM__**

The "Electromagnetic Spectrum" is a lot more easier to identify than you think. Its in the microwave you use to heat your food and the cell phone you use is also a fraction of this. The light we see is the electromagnetic spectrum, and the visible part we see in our rainbows consist of colours ranging from reds and oranges to greens, blues and purples. In short, the electromagnetic spectrum is just a name scientist use to call a group of different types of radiation when they want to talk about it as one.
 * WHAT IS IT?**




 * FACTS AND FIGURES**
 * the electromagnetic spectrum is given off by little packages of energy called //**photons**//, which can eithert be particles or waves.
 * the longest waves are over 100 kilometres long, and the shortest are less than a billionth of a milimetre long.
 * all electromagnetic waves travel at 300,000 kilometres and hour; which is the speed of light.
 * visible light is just small part of the spectrum.
 * long waves are lower in energy than short waves.
 * short waves are very energetic.
 * the range of waves from space are blocked out by earth's atnosphere, this is fortunate, because it may block out UV rays; which are dangerous.

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 * __DEFINITIONS:__**
 * PHOTONS:** a quantum of electromagnetic radiation; an elementary particle that is its own antiparticle
 * __USEFUL LINKS:__**
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 * __U:\science\The Electromagnetic Spectrum - Index page.mht__**