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Featured 21 Aug 1992 Print
Images Dated 21st August 1992
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Featured 21 Aug 1992 Print
Crossing spectra of coloured light
Spectral colours. Various colour components of two white light beams, seen after refraction by prisms. Although most people are taught that there are seven colours in the spectrum, there is in fact a countless number. Each colour may be defined by a wavelength, and there are countless discrete wavelengths in the visible range. Note also the additive colour effects where the spectra cross over
© DAVID PARKER/SCIENCE PHOTO LIBRARY