Wêne:Pierre and Marie Curie.jpg

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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.
Dîrok circa 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Çavkanî hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Xwedî Unknown authorUnknown author

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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.
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Dîrok/KatjimêrWêneyê biçûkMezinahîBikarhênerŞirove
niha08:01, 14 gulan 2014Versiyona biçûkkirî yê 08:01, 14 gulan 20142163 x 1740 (1,07 MB)Materialscientistcrop
07:57, 14 gulan 2014Versiyona biçûkkirî yê 07:57, 14 gulan 20143210 x 2196 (1,9 MB)MaterialscientistOriginal
05:17, 27 tîrmeh 2012Versiyona biçûkkirî yê 05:17, 27 tîrmeh 20122982 x 2186 (1020 KB)Materialscientistbetter version
14:29, 2 hezîran 2008Versiyona biçûkkirî yê 14:29, 2 hezîran 20082624 x 1640 (2,98 MB)CarlFromViennaEine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
18:28, 10 nîsan 2007Versiyona biçûkkirî yê 18:28, 10 nîsan 20071600 x 1091 (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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