constant

symbol

value [cgs]

charge

q

‒4.8032 × 10⁻¹⁰

mass

m

9.1094 × 10⁻²⁸

classical radius

R

2.82 × 10⁻¹³

spin angular momentum

S

9.1329 × 10⁻²⁸

magnetic dipole moment

M

‒9.284764 × 10⁻²¹

Planck’s constant

h

6.6261 × 10⁻²⁷

speed of light

c

2.99792458 × 10¹⁰