Fundamental Constants, including: Speed Of Light, Gravitational Constant, Fine-structure Constant, Boltzmann Constant, Dimensionless Physical ... Coupling Constant, Planck Constant

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More info: In physics, a dimensionless physical constant (sometimes fundamental physical constant) is a universal physical constant. Because it is a dimensionless quantity, its numerical value is the same under all possible systems of units. Fundamental physical constant may also refer (as in ) to universal but dimensional physical constants such as the speed of light c, vacuum permittivity ε0, Planck's constant ħ, or the gravitational constant G.