Several 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.1–7 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. Such an arrangement would be more suitable to show diffraction spectra to a large class.
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See The Physics Teacher Nov. 2002 cover photo.
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© 2007 American Association of Physics Teachers.
2007
American Association of Physics Teachers
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