from Wiki:
The Planck constant, written asor
when including a factor of
, is called the quantum of action.[8] Like action, this constant has unit of energy times time. It figures in all significant quantum equations, like the uncertainty principle and the de Broglie wavelength. Whenever the value of the action approaches the Planck constant, quantum effects are significant
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"The fact that values can be incommensurable means that there is no single scale on which to measure them, and that conflicts between them can be tragic, since there is no way to definitively choose one over the other without sacrificing something of great value."
- Sir Isaiah Berlin
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