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File:Pierre and Marie Curie.jpg

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原本檔案 （2,163 × 1,740 像素，檔案大細：1.07 MB ，MIME類型：image/jpeg）

摘要

描述

Pierre and Maria Skłodowska-Curie in the laboratory, demonstrating the experimental apparatus used to detect the ionsation of air, and hence the radioactivity, of samples of purified ore which enabled their discovery of radium.

Maria is operating the apparatus. With her right hand she is adding/subtracting known weights from a pan hanging from a strip of piezo-electric material which generates a very small elecrical charge (of the order of picoamperes) according to the weight hung on it. This is nulled against the charge accumulated on an ion chamber due to radioactivity. In her left hand she has a stopwatch to measure the rate of change of charge using a quadrant electrometer. When the weight is changed, the time elapsed for the charge to be nulled is measured by the stopwatch. The charge is indicated by a light spot on the scale in front of her projected by the quadrant electrometer, which is off the left of the picture.
日期 circa 1904年
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
來源 hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
作者 Unknown authorUnknown author

協議

Public domain
Public domain
The copyright of this image has expired in the European Union because it was published more than 70 years ago without a public claim of authorship (anonymous or pseudonymous), and no subsequent claim of authorship was made in the 70 years following its first publication.
EU
EU
To use this template, the image must meet both of the following two conditions:
  1. published over 70 years ago, and
  2. the original author's actual identity was not publicly disclosed in connection with this image within 70 years following its publication.

Images that lack either of these two conditions should not use this template.

Reasonable evidence must be presented that the author's name (e.g., the original photographer, portrait painter) was not published with a claim of copyright in conjunction with the image within 70 years of its original publication. Works which had not entered Public Domain in their country in 1996 that were uploaded before 1 March 2012 should be marked additionally with {{Not-PD-US-URAA}}.

Note: In some countries anonymous works are copyrighted until 70 years after the death of the author if the author's identity became public in any way during the original term. In Germany this applies to certain works published before July 1, 1995; see Übergangsrecht.

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日期／時間縮圖尺寸用戶註解
現時2014年5月14號 (三) 08:01響2014年5月14號 (三) 08:01嘅縮圖版本2,163 × 1,740（1.07 MB）Materialscientistcrop
2014年5月14號 (三) 07:57響2014年5月14號 (三) 07:57嘅縮圖版本3,210 × 2,196（1.9 MB）MaterialscientistOriginal
2012年7月27號 (五) 05:17響2012年7月27號 (五) 05:17嘅縮圖版本2,982 × 2,186（1,020 KB）Materialscientistbetter version
2008年6月2號 (一) 14:29響2008年6月2號 (一) 14:29嘅縮圖版本2,624 × 1,640（2.98 MB）BlausonorischEine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
2007年4月10號 (二) 18:28響2007年4月10號 (二) 18:28嘅縮圖版本1,600 × 1,091（161 KB）Kuebi{{Information |Description=Pierre and Marie Curie in the laboratory. Prior 1907. |Source= hp.ujf.cas.cz (uploader=--~~~~) |Date=prior 1907, because Pierre Curie died in 1906 |Author=unknown }}

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