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A commonly encountered constant defined as
where h is Planck's
constant. h-bar commonly occurs in applications involving
angular
momentum. It is implemented in Mathematica
as PlanckConstantReduced
in the Mathematica
add-on package Miscellaneous`PhysicalConstants` (which can
be loaded with the command <<Miscellaneous`).
Planck's
Constant
Eric W. Weisstein
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