Speed of light.
value = clight
clight
returns the value of the vacuum speed of light in
SI units (meters/second) in value
.
The value is taken from the 2002 CODATA collection of recommended values.
amu, avogadro, barn, bmagn, bohrrad, boltzm, echarge, emass, faraday, gfree, hartree, molgas, nmagn, nmass, planck, pmass, rydberg