An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : Planck''s constant
Planck's constant
  پایای ِ پلانک   
pâyâ-ye Planck (#)

Fr.: constante de Planck   

A physical constant that determines the energy of quantum as a function of its frequency. Denoted by h, and being 6.624 x 10-27 erg-sec, it is of vital importance in quantum physics. The reduced Planck's constant ħ = h / 2π is also called the → Dirac's constant.

Planck; → constant.

reduced Planck's constant
  پایای ِ پلانک ِ باز‌هازیده   
pâyâ-ye Planck-e bâzhâzidé

Fr.: constante de Planck réduite   

The Planck's constant divided by 2π and denoted ħ, pronounced h-bar. Also called → Dirac's constant.

Reduced, p.p. of → reduce; → Planck's constant.