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Waves

Electromagnetic Spectrum.

Electromagnetic waves can have wavelengths which range from
several thousand metres to less than one million millionth of a metre.
The waves are divided into wavelength ranges
according to the wave's effect or uses.

This is called the electromagnetic spectrum.

Radio Microwave Infra-red Visible Ultraviolet X-ray Gamma ray


You need to know the order of the regions shown above
and that radio waves have the longest wavelength
decreasing down to gamma rays which have the shortest.
As the wavelength decreases, the frequency increases.
Radio waves have the smallest frequency
and gamma rays have the largest frequency.

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Copyright © 2008 Dr. Colin France. All Rights Reserved.