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• 11:41, 25 April 2022 Physdemo talk contribs created page Spectral Tubes 2 (Created page with "{{NewDemo|subject=Light and Optics|topic=Spectral Lines|file1=tubes_01.jpg|file2=tubes_02.jpg|file3=tubes_03.jpg|file4=tubes_04.jpg}} Gas filled tubes are excited with a 5000v source. Diffraction lens glasses are passed out to the students (there are both full size diffraction glasses and 1/2 size, depending on audience size). Students are instructed to look at a line source such as a fluorescent light through the lens. Hold the lens so as to obtain the white light colo...")