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  Home > JCE Print > Journal of Chemical Education > Issues > 2004  > November  >
In the Classroom
Why Do Marbles Become Paler on Grinding? Reflectance, Spectroscopy, Color, and Particle Size
María Gabriela Lagorio
INQUIMAE/Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales-UBA Ciudad Universitaria Pabellón II, C1428EHA Buenos Aires, Argentina
Cover
November 2004
Vol. 81 No. 11
p. 1607
Abstract
Theoretical aspects of light interaction with solid particles are discussed. The dependence of the remission function (from Kubelka–Munk theory) and consequently the modification of the color of a solid with particle size are analyzed in detail. A physical interpretation of the phenomenon is given. Comparison of results from grinding glass marbles, copper sulfate, and potassium permanganate are discussed. Color changes in nanoparticles are also presented.
More Information
*  Citation
 Lagorio, María Gabriela. J. Chem. Educ. 2004 81 1607.
*  Keywords
 Materials Science; Nanotechnology; Physical Chemistry; Solids; Surface Science; Teaching / Learning Aids; UV-Vis Spectroscopy
*  History
 Created:
Last Updated:		 September 27, 2004
October 4, 2004
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