finsen unit [ N. R. Finsen ; Denmark 1860 – 1904 ] physics. Symbol FU. A measure of the intensity of ultraviolet rays, pertinent to natural and artificial sun-tanning, 1 FU corresponding to an energy intensity of 10 [mu] W[dot]m-2 from rays of wavelength 296.7 nm (1010.~ THz).
How to cite this entry:
"finsen unit" A Dictionary of Weights, Measures, and Units. Ed. Donald Fenna. Oxford University Press, 2002. Oxford Reference Online. Oxford University Press. 22 July 2011
