Constants

Get the value of a physical constant:

speed of light

permeability of vacuum

Planck energy

classical electron radius

Bohr magneton

Stefan-Boltzmann constant

Schwinger field strength

Thomson cross section

Landauer conductance

geopotential of the earth

magnetic flux quantum

Specify a constant by symbol:

hbar

eps_0

Calculations with Constants

Do computations involving constants:

0.85c

Planck mass / mass of electron