%0 Journal Article %T Wien peaks and the Lambert W function %A Stewart %A Se¨¢n M. %J Revista Brasileira de Ensino de F¨ªsica %D 2011 %I Scientific Electronic Library Online %R 10.1590/S1806-11172011000300008 %X exact expressions for the wavelengths where maxima occur in the spectral distribution curves of blackbody radiation for a number of diferent dispersion rules are given in terms of the lambert w function. these dispersion rule dependent "wien peaks" are compared to those wavelengths obtained in a setting independent of the dispersion rule chosen where the "peak" wavelengths are taken to be those obtained on dividing the total radiation intensity emitted from a blackbody into a given percentile. the account provides a simple yet accessible example of the growing applicability of the lambert w function in physics. %K blackbody radiation %K wien peaks %K lambert w function %K polylogarithm. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1806-11172011000300008&lng=en&nrm=iso&tlng=en