চিত্ৰ:Pierre and Marie Curie.jpg

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এই ফাইলটো ৱিকিমিডিয়া কমন্সৰ পৰা আমদানি কৰা হৈছে। ফাইল বিৱৰণ পৃষ্ঠাৰ সবিশেষ তথ্য তলত উল্লেখ কৰা হ’ল ।
ৱিকিমিডিয়া কমন্স এটা মুক্ত অনুজ্ঞাপত্ৰ মিডিয়াৰ ভঁৰাল। আপুনিও ইচ্ছা কৰিলে এই প্ৰকল্পত সহায় কৰিব পাৰে।

সাৰাংশ

বিৱৰণ

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.
তাৰিখ circa ১৯০৪
date QS:P,+1904-00-00T00:00:00Z/9,P1480,Q5727902
উৎস hp.ujf.cas.cz (uploader=--Kuebi 18:28, 10 April 2007 (UTC))
লেখক Unknown authorUnknown author

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তাৰিখ/সময়ক্ষুদ্ৰ প্ৰতিকৃতিআকাৰসদস্যমন্তব্য
বৰ্তমান08:01, 14 May 201408:01, 14 May 2014ৰ সংস্কৰণৰ ক্ষুদ্ৰ প্ৰতিকৃতি2,163 × 1,740 (1.07 MB)Materialscientistcrop
07:57, 14 May 201407:57, 14 May 2014ৰ সংস্কৰণৰ ক্ষুদ্ৰ প্ৰতিকৃতি3,210 × 2,196 (1.9 MB)MaterialscientistOriginal
05:17, 27 July 201205:17, 27 July 2012ৰ সংস্কৰণৰ ক্ষুদ্ৰ প্ৰতিকৃতি2,982 × 2,186 (1,020 KB)Materialscientistbetter version
14:29, 2 June 200814:29, 2 June 2008ৰ সংস্কৰণৰ ক্ষুদ্ৰ প্ৰতিকৃতি2,624 × 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 April 200718:28, 10 April 2007ৰ সংস্কৰণৰ ক্ষুদ্ৰ প্ৰতিকৃতি1,600 × 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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