electromagnetism - How to shift light to a longer wavelength / lower frequency energy level so that it becomes a different "color"? - Physics Stack Exchange
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PDF) Electromagnetic spectrum | Ugbolue Kawih - Academia.edu
Electromagnetic spectrum - Wikipedia
Light spectrum, from Theory of Colours. Goethe observed that with a prism, colour arises at light-dark edges, and the spectrum … | Teoria del color, Teoría, Colores
File:Fluorescent lighting spectrum peaks labelled.gif - Wikimedia Commons
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File:Fluorescent lighting spectrum peaks labelled.gif - Wikimedia Commons
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Light - Wikipedia
ektalks: Colour of Objects: Visible Light Spectrum; Primary Colours; Optical Illusions; How Do Colours Work?
