Physical constants

Reference

measured.physics

Defines both the fundamental dimensionless constants, as well as the foundational dimensioned physical constants of the universe.

Attributes: Physical constants

c (Quantity): The [speed that light travels unimpeded in a vacuum][1]

    [1]: https://en.wikipedia.org/wiki/Speed_of_light

G (Quantity): The "strength" of the [gravitational force][1]

    [1]: https://en.wikipedia.org/wiki/Gravitational_constant

h (Quantity): The [Planck constant][1]

    [1]: https://en.wikipedia.org/wiki/Planck_constant

ℏ (Quantity): The ["reduced" Planck constant][1]

    [1]: https://en.wikipedia.org/wiki/Planck_constant#Reduced_Planck_constant

k (Quantity): The [Boltzmann constant][1]

    [1]: https://en.wikipedia.org/wiki/Boltzmann_constant

e (Quantity): The [elementary charge][1]

    [1]: https://en.wikipedia.org/wiki/Elementary_charge

ε0 (Quantity): [Vacuum permittivity][1], the capability of an electric field to
    permeate a vacuum

    [1]: https://en.wikipedia.org/wiki/Vacuum_permittivity

mₑ (Quantity): The [mass of an electron][1]

    [1]: https://en.wikipedia.org/wiki/Electron_mass

kₑ (Quantity): Coulomb's [electric force constants][1]

    [1]: https://en.wikipedia.org/wiki/Coulomb_constant

α (Quantity): The [fine-structure constant][1], quantifying the strength of
    electromagnetic interactions

    [1]: https://en.wikipedia.org/wiki/Fine-structure_constant