+The [Planck Constant](/wiki/planc_constant) (h) is a fundamental physical constant central to [Quantum Mechanics](/wiki/Quantum_Mechanics). It quantifies the energy of a photon in relation to its frequency, revealing the discrete, granular nature of energy at the smallest scales.
+## See also
+- [Energy](/wiki/Energy)
+- [Photon](/wiki/Photon)
+- [Quantum](/wiki/Quantum)
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