### h/2pi, How does this play a part in Heisenber's Equation?

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**Sun Oct 04, 2015 3:37 pm**Dr. Lavelle brought up h/2pi, which he referred to as hbar, after stating Heisenberg's Indeterminacy (Uncertainty) Equation.

I don't understand how it plays a role to Heisenberg's equation. Where did h/2pi come from? And is there a certain time you use h/2pi instead of h/4pi?

I don't understand how it plays a role to Heisenberg's equation. Where did h/2pi come from? And is there a certain time you use h/2pi instead of h/4pi?