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A fundamental physical constant which represents the elementary quantum of action, action being defined as energy multiplied by time. Introduced by Max Planck in 1900, it has the valueh= 6.6261 × 10-27erg-second or 6.6261 × 10-34joule-second. The symbolℏ, sometimes called the Dirac...
The Planck statement is very simple to understand. It states that we cannot construct a heat engine that runs in a cycle, extracts heat from the reservoir, and performs an equal amount of work; this is impossible. So, Kelvin Planck statement consists of the word ‘impossible’ and though th...
:a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an approximate value of 6.626 × 10−34joule second —symbolh More from Merriam-Webster onPlanck's constant Britannica.com:Encyclopedia article aboutPlanck's constant ...
variants or less commonly Planck constant : a constant that gives the unvarying ratio of the energy of a quantum of radiation to its frequency and that has an exact value of 6.62607015 × 10−34 joule seconds symbol hWord History Etymology Max K. E. L. Planck First Known Use 1910,...
Planck’s constant, fundamental physical constant characteristic of the mathematical formulations of quantum mechanics, which describes the behavior of particles and waves on the atomic scale, including the particle aspect of light. The German physicist