The universal constants that Planck units , by definition , normalize to 1 are : Each of these constants can be associated with at least one fundamental physical theory : c with electromagnetism and special relativity , G with general relativity and Newtonian gravity , ħ with quantum mechanics , ε0 with electrostatics , and kB with statistical mechanics and thermodynamics .
The constants that Planck units , by definition , normalize to 1 are the : Each of these constants can be associated with at least one fundamental physical theory : c with special relativity , G with general relativity and Newton 's law of universal gravitation , ħ with quantum mechanics , ε0 with electrostatics , and kB with statistical mechanics and thermodynamics .