Prismatic and Diffraction Spectra

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The spectrum of the sun was first observed, in 1666, by Newton, who allowed light coming from a small round open ing in a shutter to pass through a glass prism. This spectrum was most impure and a pure spectrum was ...