Referring to Max Planck, German physicist who founded quantum theory, or to Planck's constant, a fundamental physical constant. Often used in physics contexts relating to quantum mechanics.
Named after Max Planck (1858-1947), German theoretical physicist. His surname derives from Middle Low German 'planke' meaning plank or board, originally an occupational name for a carpenter.
Planck's constant is arguably the most important number in modern physics - it determines the smallest possible unit of energy and essentially sets the 'pixel size' of reality. Ironically, Planck himself was initially reluctant to accept the radical implications of his own discovery.
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