Fr.: constante de couplage
In nuclear physics, a constant that indicates a measure of how strongly two particles interact.
electromagnetic coupling constant
pâyâ-ye jafsari-ye barqâmeqnâti
Fr.: constante de couplage electromagnétique
Same as → fine-structure constant.
gravitational coupling constant
pâyâ-ye jafsari-ye gerâneši
Fr.: constante de couplage gravitationnel
The dimensionless gravitational constant defined as the gravitational attraction between pair of electrons and normally given by: αG = (Gme2) / (ħc) = (me / mP)2 ~ 1.7518 × 10-45, where ħ is → Planck's reduced constant, c the → speed of light, me is the → electron mass, and mP is the → Planck mass.