Berkas:PositronDiscovery.jpg
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![Berkas:PositronDiscovery.jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/6/69/PositronDiscovery.jpg/608px-PositronDiscovery.jpg)
Ukuran pratayang ini: 608 × 599 piksel. Resolusi lainnya: 243 × 240 piksel | 487 × 480 piksel | 779 × 768 piksel | 1.039 × 1.024 piksel | 2.408 × 2.374 piksel.
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Ringkasan
DeskripsiPositronDiscovery.jpg |
English: Cloud chamber photograph of the first positron ever observed. The thick horizontal line is a lead plate. The positron entered the cloud chamber in the lower left, was slowed down by the lead plane, and curved to the upper left. The curvature of the path is caused by an applied magnetic field that acts perpendicular to the image plane. The higher energy of the entering positron resulted in lower curvature of its path. Original caption: A 63 million volt positron (Hρ = 2.1×105 gauss-cm) passing through a 6 mm lead plate and emerging as a 23 million volt positron (Hρ = 7.5×104 gauss-cm). The length of this latter path is at least ten times greater than the possible length of a proton path of this curvature. |
Tanggal | Photographed 2 Agustus 1932. Published 15 Maret 1933. |
Sumber | Anderson, Carl D. (1933). "The Positive Electron". Physical Review 43 (6): 491–494. DOI:10.1103/PhysRev.43.491. |
Pembuat | Carl D. Anderson (1905–1991) |
Izin (Menggunakan kembali berkas ini) |
Obtained from American Physical Society, March 5, 2008. The copyright for the periodical containing this picture, if renewed, would have had to be renewed in 1960 or 1961. I checked the Catalog of copyright entries for Periodicals in 1960 and 1961, http://onlinebooks.library.upenn.edu/cce/, but The Physical Review is not listed there. Therefore, the copyright on the entire issue of The Physical Review, including this picture, has expired. |
Lisensi
Public domainPublic domainfalsefalse |
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties. العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenščina ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
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Captions
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The first cloud chamber photograph of a positron's path
התצלום הראשון של פוזיטרון בתא ערפל
Diviz
Ruska antihmota obrazek vyfotene asi. Neverim moc ale neco to je a je teho moc a
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2 Agustus 1932
Riwayat berkas
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Tanggal/Waktu | Miniatur | Dimensi | Pengguna | Komentar | |
---|---|---|---|---|---|
terkini | 6 Mei 2013 19.12 | ![]() | 2.408 × 2.374 (1,91 MB) | Quibik | Combined with a moire- and halftone-free but blurrier version that was also provided in the article. Much more accurate now. |
6 Mei 2013 18.10 | ![]() | 2.500 × 2.500 (1,97 MB) | Quibik | Re-extracted the image from the source article in greater resolution, removed halftone & moiré and adjusted levels. | |
3 Mei 2008 16.54 | ![]() | 848 × 755 (71 KB) | HPaul | {{Information |Description=Cloud chamber photograph of the first positron ever observed |Source=Physical Review, Vol.43, p. 491 |Date=March 15, 1933 |Author=Carl D. Anderson |Permission=obtained from American Physical Society, March 5, 2008 |other_version |
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