Faili:Pierre and Marie Curie.jpg

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Maelezo

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

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Historia ya faili

Bonyeza tarehe/saa kuona faili kama ilivyoonekana wakati huo.

Tarehe/SaaPicha ndogoVipimoMtumiajiMaelezo
sasa hivi08:01, 14 Mei 2014Picha ndogo ya toleo la 08:01, 14 Mei 20142,163 × 1,740 (1.07 MB)Materialscientistcrop
07:57, 14 Mei 2014Picha ndogo ya toleo la 07:57, 14 Mei 20143,210 × 2,196 (1.9 MB)MaterialscientistOriginal
05:17, 27 Julai 2012Picha ndogo ya toleo la 05:17, 27 Julai 20122,982 × 2,186 (1,020 KB)Materialscientistbetter version
14:29, 2 Juni 2008Picha ndogo ya toleo la 14:29, 2 Juni 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 Aprili 2007Picha ndogo ya toleo la 18:28, 10 Aprili 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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