On Friday, November 9, 2012 10:51:38 AM UTC-6, Hyperbolic c squared wrote:
In electrostatic cgs units, the unit of electric charge, the statcoulomb, is defined so that the Coulomb constant, ke, or the permittivity factor, 4πε0, is 1 and dimensionless. Then the expression of the fine-structure constant becomes the abbreviated
a = e^2 * 1/hc