| skos:altLabel | - eponymous
- h
- constant
- hypothesis
- Planck's relation
- ħ
- ''h''
- ''reduced'' Planck constant
- ''ħ'' = ''h''/(2π)
- Dirac constant
- Energy/frequency
- Planck constant#Reduced Planck constant
- Planck constant#Reduced%20Planck%20constant
- Planck's constant
- Planck's reduced constant
- Planck–Einstein law
- Reduced Planck constant
- molar Planck constant
- planck constant
- quantum of action
- reduced Planck constant
- reduced Planck constant ''ħ''
- reduced Planck constant.
- reduced Planck's constant
- the Planck constant
- ℎ
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