The World Communicates
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  The story of communications and optics from the time of the ancients, now and into the future.
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The Electromagnetic Spectrum
Visible spectrum Radio & television Show source Show source Show source Show source Show source Show source Show source Show source Show source Show source
The electromagnetic spectrum extends all the way from low energy radiation produced by powerlines right up to high energy gamma rays produced by nuclear reactions. Click on the coloured sections of the spectrum to find out more.

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