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