| Zugriffsnummer | 12876 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | ohne Peer Review |
| Sprache | Englisch |
| Titel | Determination of the gravitational constant G by means of a beam balance |
| Autor(in); Institution |
Nolting, F.; University of Zurich, Physics Institute, Zürich, SWITZERLAND
Schurr, Jürgen; 2.103, AC Quanten-Hall-Effekt, PTB-Braunschweig
Schlamminger, St.; University of Zurich, Physics Institute, Zürich, SWITZERLAND
Kündig, W.; University of Zurich, Physics Institute, Zürich, SWITZERLAND
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| Quelle/Jahr | Europhysics News: 31 (2000), 4, 25 - 27 |
| ISSN | 0531-7479 (PRINT) ; 1432-1092 (ONLINE) |
| DOI | |
| URL | |
| Verlag | Les Ulis: EDP Sciences |
| Zusammenfassung | At the end of 1999, an international committee (the CODATA) decided to increase the uncertainty of the accepted value for the gravitational constant from 128 ppm to 1500 ppm. This remarkable step of increasing the uncertainty instead of decreasing was made to reflect the discrepancies between recent experiments. These experiments were originally performed with the aim to improve the accuracy of G, since even before increasing its uncertainty the gravitational constant had a very large uncertainty compared to that of other fundamental constants. The confusion started in 1995 when three groups published their results, which span a wide range of 0.7% (see Figure 1) - for reasons which remain unknown. The device most often used for measuring G is the torsion balance of Cavendish in one of its various forms, and 1998 was the 200 anniversary of the publication of his paper entitled "Experiments to determine the density of the Earth". |
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