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This article is about the visible spectrum. For all other uses see: Spectrum (disambiguation)

The spectrum in a rainbow

A spectrum, plural: spectra, is a band of several colours: violet, indigo, blue, green, yellow, orange and red. A spectrum can be seen if the Sun's light is passed through a prism and allowed to gather on a white screen. This visible spectrum is part of the larger electromagnetic spectrum. Spectroscopy is the study of spectra. view more...

Fourier Transform, Fourier Series, and frequency spectrum

Fourier Transform, Fourier Series, and frequency spectrum
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