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Mynd: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.
Dagsetning circa 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Uppruni hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Höfundarréttarhafi ÓþekkturUnknown author

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Smelltu á dagsetningu eða tímasetningu til að sjá hvernig hún leit þá út.

Dagsetning/TímiSmámyndVíddirNotandiAthugasemd
núverandi14. maí 2014 kl. 08:01Smámynd útgáfunnar frá 14. maí 2014, kl. 08:012.163 × 1.740 (1,07 MB)Materialscientistcrop
14. maí 2014 kl. 07:57Smámynd útgáfunnar frá 14. maí 2014, kl. 07:573.210 × 2.196 (1,9 MB)MaterialscientistOriginal
27. júlí 2012 kl. 05:17Smámynd útgáfunnar frá 27. júlí 2012, kl. 05:172.982 × 2.186 (1.020 KB)Materialscientistbetter version
2. júní 2008 kl. 14:29Smámynd útgáfunnar frá 2. júní 2008, kl. 14:292.624 × 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. apríl 2007 kl. 18:28Smámynd útgáfunnar frá 10. apríl 2007, kl. 18:281.600 × 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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