Òbrôzk: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.
Datum około 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Zdrój hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Aùtor NieznanyUnknown author

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Datum/CzasMiniaturaMiaraBrëkòwnikÒpisënk
aktualny10:01, 14 môj 2014Miniatura wersëji z 10:01, 14 môj 20142163 × 1740 (1,07 MB)Materialscientistcrop
09:57, 14 môj 2014Miniatura wersëji z 09:57, 14 môj 20143210 × 2196 (1,9 MB)MaterialscientistOriginal
07:17, 27 lëp 2012Miniatura wersëji z 07:17, 27 lëp 20122982 × 2186 (1020 KB)Materialscientistbetter version
16:29, 2 cze 2008Miniatura wersëji z 16:29, 2 cze 20082624 × 1640 (2,98 MB)CarlFromViennaEine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
20:28, 10 łżë 2007Miniatura wersëji z 20:28, 10 łżë 20071600 × 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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