| Planck's constant | A constant, 6.6260755 × 10-34 J - s (joule-seconds) or 6.6260755 × 10-27 erg-seconds = 6.6260755 × 10-34 J Hz-1 (joule per hertz). (05 Mar 2000) |
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| Planck's theory | The theory that the radiation and absorption of energy take place in definite quantities called quanta (e) which vary in size and are defined by the equation e=hv in which h is planck's constant and v is the frequency of the radiation. (12 Dec 1998) |
| Planck, Max | <person> German physicist and Nobel laureate, 1858-1947. See: Planck's constant, Planck's theory. (05 Mar 2000) |
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| Fokker-Planck equation | <radiobiology> An equation that describes the time rate of change of a particle's velocity as a result of small-angle collisional deflections. Applicable when the cumulative effect of many small-angle collisions is greater than the effect of rarer large-angle deflections. (09 Oct 1997) |
| 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's constant |
A universal constant, denoted by h, with the value 6.626075 x 10 -34 Js, in the quantum theory of matter and radiation. Planck's constant is the bridge between the wave and particle descriptions of light, an electromagnetic wave of frequency alternatively described as a stream of photons each with energy h . ...
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| Planck's constant |
Planck's constant is a fundamental parameter in quantum mechanics. It determines the size of the discrete units or energy, mass, spin, etc. into which the microscopic world is partitioned. Its value is 1.05 x 10 -27 grams-cm/sec.
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| Planck's constant |
h (E=hv where v is the frequency of a radiation, and E is its quantum of energy) and Planck's law of radiation (the magnitude of electromagnetic radiation energy (including light) is the product of Planck's constant and the frequency of the radiation) are named after him. Originator of Quantum theory. [PRS. DoS. RE]
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| Planck's constant |
In quantum physics, this is a fundamental constant of nature (h = 1.05 *10 -34 kgms -1 ). It is significant in the subatomic realm, but negligible in macroscopic systems.
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| planck\'s | the constant of proportionality relating the energy of a photon to its frequency |
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| planck\'s | (physics) the basis of quantum theory |
| planck\'s | (physics) an equation that expresses the distribution of energy in the radiated spectrum of an ideal black body |
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