There is other similar applets that i encountered. by Mike Lee & Wolfgang Christian. by Wolfgang Christian.
Like: the composite colors by University of Colorado - Michael Dubson, Kathy Perkins & Wendy Adams
Like: fantastic, worksheets from contributors [img][/img]
Blackbody Radiation: Frequency and Wavelength written by Jose Ignacio Fernández Palop
Like: the context of the black body diagram and the resultant color