चित्र:Waveguide collection.jpg
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सारांश
| विवरण |
English: An assortment of standard waveguide components, from an advertisement by De Mornay - Budd Inc., New York, in a 1947 electronics magazine. Waveguide is used to conduct microwave radio waves from place to place. Microwaves are used in data networking links, communications satellites, satellite TV, radar, and microwave ovens. A waveguide is a conductive metal "pipe" that confines the microwaves. |
| दिनांक | |
| स्रोत | Retrieved July 31, 2014 from Tele-Tech magazine, Caldwell-Clements Inc., Bristol, Connecticut, Vol. 6, No. 4, April 1947, p. 79 on American Radio History website |
| लेखक | अनजान |
| अनुमति (इस चित्र का पुनः उपयोग करना) |
This image is from an advertisement for De Mornay - Budd, Inc. without a copyright notice published in a 1947 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain. |
लाइसेंस
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This work is in the public domain in the United States because it was published in the United States between 1929 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.
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