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Dosiero:Pierre and Marie Curie.jpg

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Resumo

Priskribo

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.
Dato ĉirkaŭ 1904
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
Fonto hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
Aŭtoro NekonataUnknown author

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Dosierhistorio

Alklaku iun daton kaj horon por vidi kiel la dosiero tiam aspektis.

Dato/HoroBildetoGrandecojUzantoKomento
nun08:01, 14 maj. 2014Bildeto por versio ekde 08:01, 14 maj. 20142 163 × 1 740 (1,07 MB)Materialscientistcrop
07:57, 14 maj. 2014Bildeto por versio ekde 07:57, 14 maj. 20143 210 × 2 196 (1,9 MB)MaterialscientistOriginal
05:17, 27 jul. 2012Bildeto por versio ekde 05:17, 27 jul. 20122 982 × 2 186 (1 020 KB)Materialscientistbetter version
14:29, 2 jun. 2008Bildeto por versio ekde 14:29, 2 jun. 20082 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).
18:28, 10 apr. 2007Bildeto por versio ekde 18:28, 10 apr. 20071 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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