the distribu-tion of the energy in different wavelengths. Thus, the spec-trum from the pole of a carbon arc is not only brighter through-out than that from the filament of a tungsten incandescentlamp,—it also has a greater proportion of its energy in theshorter wavelengths than that from the same… … WAVELENGTH Figure 64 hj black body, which is defined as one which absorbs all light,of whatsoever wavelength, that falls upon it, reflecting none.Strictly speaking no objects are absolutely black, though suchmaterials as lampblack and platinum-black nearly fulfill thedefinition. But it can be shown…
Light
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