جرم ِ پلانک
Fr.: masse de Planck
1) The unit of mass in Planck's system of physical units,
mP = √ (ħ c/ G) = 2.176 × 10-8 kg.
It is also the mass of a → black hole
whose → Compton wavelength is comparable to its
→ Schwarzschild radius.
2) The fundamental unit of mass in the theory of gravitation. It is
the mass of hypothetical particles where gravitational attraction
for eachother would be as strong as the electric force between two
electrons separated by the same distance (Steven Weinberg).
→ Planck; → mass.