Planck charge
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Planck charge
In physics, the Planck charge, denoted by 
, is one of the base units in the system of natural units called Planck units. It is a quantity of electric charge defined in terms of fundamental physical constants.
The Planck charge is defined as:[1]
where:
is the speed of light in the vacuum,
is Planck's constant,
is the reduced Planck constant,
is the permittivity of free space
is the elementary charge
= (137.03599911)−1 is the fine structure constant.
The Planck charge is 
times greater than the elementary charge e carried by an electron.
The Gaussian cgs units are defined so that 
, in which case has the following simple form:
See also
References
- ^ Stock, Michael; Witt}, Thomas J (2006). "CPEM 2006 round table discussion 'Proposed changes to the SI'". Metrologia 43 (6): 583. Bibcode 2006Metro..43..583S. doi:10.1088/0026-1394/43/6/014.
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