Bestand: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 ca. 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Bron hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Auteur OnbekendUnknown author

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Public domain
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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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Datum/tijdMiniatuurAfmetingenGebruikerOpmerking
huidige versie14 mei 2014 10:01Miniatuurafbeelding voor de versie van 14 mei 2014 10:012.163 × 1.740 (1,07 MB)Materialscientistcrop
14 mei 2014 09:57Miniatuurafbeelding voor de versie van 14 mei 2014 09:573.210 × 2.196 (1,9 MB)MaterialscientistOriginal
27 jul 2012 07:17Miniatuurafbeelding voor de versie van 27 jul 2012 07:172.982 × 2.186 (1.020 kB)Materialscientistbetter version
2 jun 2008 16:29Miniatuurafbeelding voor de versie van 2 jun 2008 16:292.624 × 1.640 (2,98 MB)CarlFromViennaEine manuell überarbeitete Version des bekannten Fotos. Details wurden nachgezeichnet zum Abdruck im Reclam-Heftchen nachbearbeitet (also nicht von mir).
10 apr 2007 20:28Miniatuurafbeelding voor de versie van 10 apr 2007 20:281.600 × 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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