-ˈjēnz- noun
Usage: usually capitalized R&J
Etymology: after Baron J. W. S. Rayleigh and Sir James Hapwood Jeans died 1946 English physicist
: an approximation in respect to thermal radiation: the emissive power of a blackbody at absolute temperature T and at a given wavelength λ is directly proportional to T and inversely proportional to λ 4 — compare planck radiation law