Newton’s Green and Goethe’s Purple – Color Experiments with LEDs
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[1] University of Leipzig
University of Leipzig
Kreisfreie Stadt Leipzig, Alemania
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- Localización: The Physics Teacher, ISSN 0031-921X, Vol. 59, Nº. 9, 2021, págs. 712-718
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
White light refracted by a glass edge or a prism might be split into the colors of the rainbow but, when restricted by a suitable arrangement of edges, might also yield a sequence of colors complementary to the rainbow. We studied the creation of these color fields experimentally with a setup consisting of RGB light-emitting diodes that cover all color combinations of the three primary colors red, green, and blue. These light fields were projected through a prism onto a screen or a camera to generate various color fields by refraction. Applying the rules of additive color mixing, a simple RGB model based on the slit spectrum of the light convincingly reproduces the observed color patterns. The parallel use of model and experiment enables a clear recognition of unusual spectra from particularly combined light fields and yields an explanation of their origin
