Spectrum
From Wikipedia, the free encyclopedia
This article is about the visible spectrum. For all other uses see: Spectrum (disambiguation)
A spectrum (plural: spectra or spectrums[1]) 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.[2] A natural example of a spectrum is a rainbow. The word spectrum was first used by scientists studying optics. They used the word to describe the rainbow of colors in visible light when separated using a prism.
