Bohr angular momentum quantization (L = nħ = nh/(2π))

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L = nħ = nh/(2π)

What each symbol means

SymbolWhat it stands for
LMagnitude of angular momentum in Bohr model
nPrincipal quantum number

When to use this

Old quantum theory Bohr postulate for circular orbits; replaced by L = √(l(l+1))ħ in full QM.