Planck's constant English

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Planck's constant Noun

— Planck's constant is a measure of the size of a quantum, or the smallest 'piece' of energy that exists. It has a value mathh \approx 6.626 \times 10^{-34}\ \mathrm{J} \cdot \mathrm{s}/math

Planck's constant

— noun (= Planck''s constant) the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second

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Planck constant