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Masse > Kilogramm > Planck Mass (en)

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planckmassPlanck Mass (en)  

تعریف

  • In physics, the Planck mass, denoted by $m_P$, is the unit of mass in the system of natural units known as Planck units. It is defined so that $\\approx 1.2209 \ imes 10 GeV/c_0 = 2.17651(13) \ imes 10 kg$, (or $21.7651 \\mu g$), where $c_0$ is the speed of light in a vacuum, $G$ is the gravitational constant, and $\\hbar$ is the reduced Planck constant. Particle physicists and cosmologists often use the reduced Planck mass, which is $\\approx 4.341 \ imes 10 kg = 2.435 \ imes 10 GeV/c$. The added factor of $1/{\\sqrt{8\\pi}}$ simplifies a number of equations in general relativity. Quantum effects are typified by the magnitude of Planck's constant.

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