Spectra of three light sources with a CD

CD Rainbows

“…J. Ouseph, Physics Department, University of Louisville, KY S everal papers have been published on the use of a CD as a grating for undergraduate laboratories and/or for high school and college class demonstrations. [1][2][3][4][5][6][7] Four years ago The Physics Teacher had a spectacular cover picture showing emission spectrum as viewed through a CD with no coating. 8 That picture gave the impetus to develop a system that can project the spectra of light falling on a CD on a white board or a screen.…”