Check out this awesome vintage poster of electromagnetic radiations. You can even print out a full size one yourself here!
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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