File:Radio_waves.svg
From Wikipedia, the free encyclopedia
Original file (SVG file, nominally 929 × 585 pixels, file size: 340 KB)
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionRadio waves.svg |
English: Diagram of the electric fields (E) and magnetic fields (H) of radio waves emanating from a quarter-wave monopole radio transmitting antenna (small dark vertical line in the center). The diagram is a cross section of the three-dimensional radiation pattern, which is symmetrical about the vertical axis of the antenna (vertical dotted line). The lines are the electric field lines. The dots and crosses represent the magnetic field lines. The magnetic field lines are horizontal circles about the antenna axis, perpendicular to the plane of the drawing. The dots represent magnetic field lines emerging from the page, while the crosses are magnetic field lines entering the page. The E and H fields are perpendicular as implied by the phase diagram in the lower right. The electric and magnetic field patterns travel away from the antenna at the speed of light. |
Date |
Original: 1922 |
Source |
Own work based on: Radio waves.jpg Original: Stuart Ballantine (1922) Radiotelephony for Amateurs, 2nd Ed., David McKay Co., USA |
Author |
Vectorized by Hardwigg Original: Stuart Ballantine |
Licensing
Public domainPublic domainfalsefalse |
The author died in 1944, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 75 years or fewer. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929. | |
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 14:51, 11 June 2014 | 929 × 585 (340 KB) | McZusatz | smooth line (uploaded using chunked upload script) | |
21:33, 3 March 2012 | 929 × 585 (341 KB) | Hardwigg | Fixed typo | ||
21:20, 3 March 2012 | 929 × 585 (341 KB) | Hardwigg |
File usage
Global file usage
The following other wikis use this file:
- Usage on bg.wikipedia.org
- Usage on fi.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on fr.wiktionary.org
- Usage on ha.wikipedia.org
- Usage on incubator.wikimedia.org
- Usage on ml.wikipedia.org
- Usage on my.wikipedia.org
- Usage on pcm.wikipedia.org
- Usage on sr.wikipedia.org
- Usage on vi.wikipedia.org
- Usage on zh.wikipedia.org
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Width | 929 |
---|---|
Height | 585 |