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  Home > JCE Print > Journal of Chemical Education > Issues > 2002  > June  >
In the Classroom
Tested Demonstrations
Exploring the Diffraction Grating Using a He-Ne Laser and a CD-ROM
Joel Tellinghuisen
Department of Chemistry, Vanderbilt University, Nashville, TN 37235

checked by: Carl Salter
Department of Chemistry, Moravian College, Bethelem, PA 18018

Cover
June 2002
Vol. 79 No. 6
p. 703
Abstract
A compact disc (CD) serves as a diffraction grating for the study of the dependence of the angles of diffracted beams on that of the incident beam from a He-Ne laser. The demonstration/experiment illustrates in a visually powerful way the occurrence of different orders of diffraction. Knowledge of the wavelength of the laser permits determination of the groove spacing within ~1% by direct measurement of the angles with a protractor.
Supplement
Illustrations of the diffracted beams, in color, are available.
*  Contents
*  Download
JCE2002p0703W.pdf
More Information
*  Citation
 Tellinghuisen, Joel. J. Chem. Educ. 2002 79 703.
*  Keywords
 Demonstrations; Lasers / Laser Spectroscopy; Instrumental Methods; Physical Chemistry; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 May 17, 2002
March 16, 2005
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