Reduced Planck constant: h-bar

reducedPlanckConstant, ℏ, equals Planck constant divided by 2π. It is the standard quantum constant for angular momentum and angular frequency.

Practical use

Use ℏ in E = ℏω and quantum commutation relations. Compare planckConstant for ordinary frequency and tau for the full-turn factor 2π.

Caveats

Do not mix ω with frequency ν: they differ by 2π. Use multiply with units of radians per second, and retain the distinction in symbolic work with simplify.