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Planck's constant

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Planck's constant (plängks)
n.
Symbol h The constant of proportionality relating the energy of a photon to the frequency of that photon. Its value is approximately 6.626 × 10-34 joule-second.
Planck's constant (h)
[plangks]
Etymology: Max Planck, German physicist, 1858-1947
a fundamental physical constant that relates the energy of radiation to its frequency. It is expressed as 6.63 × 10-27 erg-seconds or 6.63 × 10-34 joule-seconds. See also photon.
photon 
The basic unit of radiant energy defined by the equation
E = hν
where h is Planck's constant (6.62 ✕ 10−34 joule ✕ second), ν the frequency of the light and E the energy difference carried away by the emission of a single photon of light. The term photon usually refers to visible light whereas the term quantum refers to other electromagnetic radiations. See quantum theory; wave theory; troland.
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2]R / R having the dimension of an energy and containing Planck's constant and (therefore) appropriately defined quantum potential.
Toward an a-temporal interpretation of quantum potential by Fiscaletti, Davide; Sorli, Amrit / Frontier Perspectives
However, this approach is not appropriate for time-of-flight neutron diffraction for which the measured time of flight t is related to d-spacing d as; t = (2 mL/ h)d sin [theta] where m = neutron mass L = neutron flight path h = Planck's constant [theta] = scattering angle and the time resolution dt/t is given by: dt/t = (dL/L) + (cot [theta]) d[theta].
Multidataset refinement resonant diffraction, and magnetic structures by Attfield, J. Paul / Journal of Research of the National Institute of Standards and Technology
1/2]] (1) where m, e, and h are the electron mass, charge on an electron, and Planck's constant, respectively, and [phi], s, V are the height of tunnelling barrier, the barrier's width and the voltage applied across the barrier, respectively.
Effects of strain and temperature on the electrical properties of ... by Feng, Jiyun; Chan, Chi-Ming / Polymer Engineering and Science
 
 
 
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