Definition:Reduced Planck Constant

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The reduced Planck constant is the physical constant $\hbar$ which is derived from Planck's constant by dividing it by $2 \pi$:

$\hbar = \dfrac h {2 \pi}$


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



The symbol for the reduced Planck constant is $\hbar$.

The $\LaTeX$ code for \(\hbar\) is \hbar .

Also known as

The reduced Planck constant can also be seen referred to as:

Also see

Source of Name

This entry was named for Max Karl Ernst Ludwig Planck.