fundamental scales (fundamental/natural physical units)
speed of light\, cc
Planck's constant\, ℏ\hbar
gravitational constant\, G N=κ 2/8πG_N = \kappa^2/8\pi
Planck scale
Planck length\, ℓ p=ℏG/c 3\ell_p = \sqrt{ \hbar G / c^3 }
Planck mass\, m p=ℏc/Gm_p = \sqrt{\hbar c / G}
depending on a given mass mm
Compton wavelength\, λ m=ℏ/mc\lambda_m = \hbar / m c
Schwarzschild radius\, 2mG/c 22 m G / c^2
depending also on a given charge ee
GUT scale
string scale
string tension\, T=1/(2πα ′)T = 1/(2\pi \alpha^\prime)
string length scale\, ℓ s=α′\ell_s = \sqrt{\alpha'}
string coupling constant\, g s=e λg_s = e^\lambda
Last revised on June 16, 2023 at 06:43:00. See the history of this page for a list of all contributions to it.