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Definition 2025

ℏ

ℏ

ℏ	U+210F, ℏ PLANCK CONSTANT OVER TWO PI

← ℎ
[U+210E]

Letterlike Symbols

ℐ →
[U+2110]

See also: Appendix:Variations of "h"

Translingual

Symbol

ℏ ("h-bar")

(physics) Reduced Planck's constant, sometimes called Dirac's constant. Has the value ℎ/2π (where h is Planck's constant).