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%I #14 Jun 18 2023 13:18:06
%S 2,5,8,1,2,8,0,7
%N Decimal expansion of the conventional value of von Klitzing constant (R{K-90}) in ohms (Omega).
%C In 1988, the CIPM recommended the adoption of conventional value for the von Klitzing constant as exactly R{K-90} = 25812.807 ohms as of 1 January 1990.
%C Consequently, in 1991, the eighteenth CGPM noted the conventional value for the von Klitzing constant. Furthermore, in 2000, the CIPM approved the use of the quantum Hall effect, with the value of R{K-90} to be used to establish a reference standard of resistance. Finally, in 2018, the twenty-sixth CGPM resolved to abrogate the conventional value of the von Klitzing constant with the 2019 redefinition of SI base units (as stated on the Wikipedia page "Conventional electrical unit", see Links).
%H NIST Physics Laboratory, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?rk90">Conventional value of von Klitzing constant R_{K-90}</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Conventional_electrical_unit">Conventional electrical unit</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Magnetic_flux_quantum">Magnetic flux quantum</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/2019_redefinition_of_the_SI_base_units">2019 redefinition of the SI base units</a>
%e R{K-90} = 25812.807 ohms.
%Y Cf. A248508, A248510, A361006, A361010, A361011, A361352, A362000, A362530.
%K cons,nonn,fini,full
%O 5,1
%A _Marco Ripà_, Apr 26 2023
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