"The Discovery of the Spectrum of Light" "The Discovery of the Spectrum of Light" The Discovery of Ultraviolet Light The Discovery of the Spectrum of Light Infrared light The Discovery of the Spectrum of Light The Discovery of Ultraviolet Light The Discovery of the Spectrum of Light The Discovery of the Spectrum of Light The Discovery of the Spectrum of Light The Discovery of the Spectrum of Light Ptolemy, Alhazan, Bacon and Newton