An Etymological Dictionary of Astronomy and Astrophysics

A formula that determines the distribution of intensity of radiation that prevails under conditions of thermal equilibrium at a temperature T: B_v = (2hν³ / c²)[exp(hν / kT) - 1]^-1 where h is Planck’s constant and ν is the frequency.

See also: → Planck; → blackbody;
→ formula.