DAVID PARKER / SCIENCE PHOTO LIBRARY DAVID PARKER / SCIENCE PHOTO LIBRARY
The refraction of incident white light through an equilaterally triangular prism. The incident beam of white light passes through a collimation slit (to compress it into a coherent beam) and is refracted as it passes through the prism, producing the spectrum of violet, indigo, blue,green, yellow, orange and red light.
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