Monday, January 3, 2011

Electromagnetic Waves

Transverse waves are waves in which particles vibrate at right angles to the direction in which the wave is traveling. Electromagnetic waves are transverse waves made of constantly changing electric and magnetic fields. They are all invisible, except for the ones that make up light. They can also travel through almost anything. The range of waves, in order of frequency and wavelength, are on the electromagnetic spectrum. Frequency is the number of complete waves that travel past a point in one second. The wavelength is the distance between one wave and the low point of the next wave.

The rays toward the beginning are the gammarays. They are short and I think they are the ones used in chemotherapy. The next are the X-rays, the ones used to take X-rays. After that are the untraviolet rays, the ones which the ozone layer helps protect us from. After that are the visble light rays, the one we can see through a spectrum. After that are the infrared waves, given out by anything hot. Then we have the microwaves. We all know what those are used for. Last, we have rays that are used to broadcast radio and TV.

Well, I hope you've learned something about waves. Oh, here's a last little thing. All waves travel at the same speed, about 300,000 kilometers per second. Isn't that cool?

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