An Old Westinghouse Chart of the Electromagnetic Spectrum

Here's an old Westinghouse chart illustrating the Electromagnetic Spectrum. I found a faded version of this on the web (the link is now broken), and I tweaked it to improve legibility. It is best viewed at full resolution. Notice the small part of the spectrum in the upper right that the human eye can detect.... we don't see very much.

If anybody knows, please let me know where I can get a better version of this chart.


Here's a more current version of the spectrum.



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