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Planck Constant

(h, Planck's Constant)
(quantum of action in quantum mechanics)

The Planck Constant (h) is 6.626068 × 10-34 m2 kg/s. The relation of a Photon's energy to frequency is

E = h × f

(E being energy, f being Frequency).

The Reduced Planck Constant (or Dirac Constant, abbreviated ) is h/2π, which is convenient because many equations incorporate this expression.

A set of units based upon fundamental constants, including the Planck constant determine some minimal scales regarding current physical laws: Planck Length, Planck Mass, and Planck Time. For example, a black hole of the Planck mass (a Planck Hole) is considered as small as they can be.

tP ≡ √(ℏG/c5)

mP ≡ √(ℏc/G)

lP ≡ √(ℏG/c3)
  • tP - Planck time (5.39 × 10-44 s).
  • mP - Planck mass (2.18 × 10-5 g).
  • lP - Planck length (1.62 × 10-33 cm).
  • G - Gravitational Constant.
  • c - speed of light.

(physics,constant,quantum mechanics)
http://en.wikipedia.org/wiki/Planck_constant
http://en.wikipedia.org/wiki/Planck_units

Referenced by:
Black-Body Radiation
Bohr Model
Carbon Monoxide (CO)
Frequency
Planck Function
Saha Equation
Stefan-Boltzmann Constant (σ)

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