Ehtesham, Bushra and John, Thomas and Yadav, Sanjay and Singh, Hari Krishna and Mandal, Goutam and Singh, Nidhi (2020) Journey of Kilogram from Physical Constant to Universal Physical Constant (h) via Artefact: A Brief Review. Mapan, 35 (4). pp. 585-593. ISSN 0970-3950
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Abstract
The redefinition of mass adopted in November 2018 and implemented from 20 May 2019, i.e. World Metrology Day, eliminated the artefact-based approach dependent upon the International Prototype of the Kilogram (IPK), in favour of realizing the kilogram in terms of the Planck constanthby fixing its value as 6.62607015 x 10(-34) J s. In this paper, the authors present a general outline of the circumstances and related developments that paved the way for the new definition that replaced the IPK after a period of 130 years since it was formally sanctioned to define the kilogram in 1889. The new definition opens up fascinating developments in mass metrology which include different realization techniques, realizing the unit at values other than 1 kg, numerous sources for traceability can be envisaged etc.
| Item Type: | Article |
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| Additional Information: | Copyright for this article belongs to M/s Springer Verlag. |
| Subjects: | Instruments/ Instrumentation Applied Physics/Condensed Matter |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. Yogesh Joshi |
| Date Deposited: | 22 Mar 2022 11:43 |
| Last Modified: | 22 Mar 2022 11:43 |
| URI: | http://npl.csircentral.net/id/eprint/4784 |
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