|
In physics, the Planck charge is the natural unit of electric charge, denoted by <math>q_p<math>. It is defined as
- <math>q_p = (2ch\epsilon_0)^\frac{1}{2}<math>
where :
- c is the speed of light in a vacuum,
- h is Planck's constant,
- <math>\epsilon_0<math> is the permittivity of free space.
Its value as expressed in SI units is
- <math>q_p<math> = 1.875 × 10−18 C.
It is about 11.7 times the charge on an electron, ignoring the sign.
|
