Spectra Spectroscopy uses various forms of electromagnetic radiation for analysis.
Spectroscopy comprises absorption, emission, or scattering.
He then passed each of these colors through other prisms and found they did not change. When Newton passed the whole band of colored lights through a prism in reverse order, the colored band became white sunlight again. Newton concluded that white light is really a mixture of colored lights and each color bends by a different amount when passing through the prism. Ironically, Newton believed the spectrum to be his most important discovery. Spectra were soon obtained for the different elements and their lines charted.