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DescriptionChart of Electromagnetic Radiations.jpg	English: 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.
Date	1944
Source	https://www.flickr.com/photos/llnl/9403051123/
Author	W.M Welch Scientific Company


	Category:Featured pictures on Wikimedia Commons#Chart%20of%20Electromagnetic%20Radiations.jpgThis is a featured picture on Wikimedia Commons (Featured pictures) and is considered one of the finest images. See its nomination here. If you have an image of similar quality that can be published under a suitable copyright license, be sure to upload it, tag it, and nominate it.

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This work is in the public domain in the United States because it was published in the United States between 1931 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

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Category:PD US no notice#Chart%20of%20Electromagnetic%20Radiations.jpg Category:Electromagnetic spectrum illustrations Category:Files by JayCubby

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File:Chart of Electromagnetic Radiations.jpg

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