The Planck length can be defined from three fundamental physical constants : the speed of light in a vacuum , the Planck constant , and the gravitational constant .
It is a base unit in the system of Planck units , developed by physicist Max Planck .
The physicist length can be defined from three fundamental physical constants : the speed of light in a vacuum , the Planck constant , and the gravitational constant .
It is a base unit in the system of Planck units , developed by physicist Max Planck .