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Chart of Electromagnetic Radiations | by Lawrence Livermore National Laboratory (LLNL)
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Chart of Electromagnetic Radiations

If you're into scientific antiques, you have to examine the details in this 1944 poster from the W.M Welch Scientific Company: "Chart of Electromagnetic Radiations." It was found tucked away in the back of an unused office years ago, but now hangs framed in a high-traffic hallway populated by Lawrence Livermore engineers.

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Taken on July 30, 2013