reduced Planck's constant

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• Planck units — are units of measurement named after the German physicist Max Planck, who first proposed them in 1899. They are an example of natural units, i.e. units of measurement designed so that certain fundamental physical constants are normalized to 1. In …   Wikipedia

• Planck momentum — is the unit of momentum, denoted by m P c, in the system of natural units known as Planck units.m P c = frac{hbar}{l P} = sqrt{frac{hbar c^3}{G approx 6.52485 kg m/swhere*{l P} is the Planck length *hbar is the reduced Planck s constant *c is the …   Wikipedia

• Planck energy — In physics, the unit of energy in the system of natural units known as Planck units is called the Planck energy, denoted by E P.:E p = sqrt{frac{hbar c^5}{G approx 1.956 times; 109 J approx 1.22 times; 1019 GeV approx 0.5433 MWhwhere c is the… …   Wikipedia

• Planck charge — In physics, the Planck charge, denoted by q P, is a quantity of electric charge defined in terms of fundamental constants. It is the unit of charge in the system of natural units known as Planck units. The Planck charge is defined as:q P = sqrt{4 …   Wikipedia

• Planck pressure — The Planck pressure is the unit of pressure, denoted by pP, in the system of natural units known as Planck units.p P = frac{F P}{l P^2} = frac{c^7}{hbar G^2} approx 4.63309 × 10113 PawhereF P is the Planck forcec is the speed of light in a… …   Wikipedia

• Planck angular frequency — The Planck angular frequency is the unit of angular frequency, denoted by ωP, in the system of natural units known as Planck units. omega p = frac{1}{t p} = sqrt{frac{c^5}{hbar G approx 1.85487 × 1043 s 1wherec is the speed of light in a… …   Wikipedia

• Planck constant — Planck s relation redirects here. For the law governing black body radiation, see Planck s law. Values of h Units 6.62606957(29)×10−34 J·s[1] 4.135 …   Wikipedia

• Planck temperature — The Planck temperature, named after German physicist Max Planck, is the unit of temperature, denoted by TP, in the system of natural units known as Planck units. It is one of the Planck units that represent a fundamental limit of quantum… …   Wikipedia

• Planck time — In physics, the Planck time ( tP ), is the unit of time in the system of natural units known as Planck units. It is the time it would take a photon travelling at the speed of light in a vacuum to cross a distance equal to the Planck length.cite… …   Wikipedia

• Rydberg constant — The Rydberg constant, named after the Swedish physicist Johannes Rydberg, is a physical constant relating to atomic spectra in the science of spectroscopy. Rydberg initially determind its value empirically from spectroscopy, but then later, it… …   Wikipedia

• Gravitational coupling constant — The gravitational coupling constant, αG, is a fundamental physical constant, the coupling constant characterizing the gravitational attraction between two elementary particles with charge and nonzero mass. αG is also a dimensionless quantity, so… …   Wikipedia