Definition:Reduced Planck Constant/Value

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Reduced Planck Constant: Value

\(\ds \hbar\) \(=\) \(\ds 1 \cdotp 05457 \, 1817 \ldots \times 10^{-34} \, \mathrm {J \, s}\) This sequence is A254181 in the On-Line Encyclopedia of Integer Sequences (N. J. A. Sloane (Ed.), 2008).
\(\ds \) \(=\) \(\ds 1 \cdotp 05457 \, 1817 \ldots \times 10^{-27} \, \mathrm {erg \, s}\)


Sources

which gives the mantissa as $1 \cdotp 054 \, 591 \, 9$ with an uncertainty of $\pm 80$ corresponding to the $2$ least significant figures