The Physics Teacher, Vol. 42, No. 3, pp. 138–142, March 2004
©2004 American Association of Physics Teachers. All rights reserved.
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Color Mixer for Every Student

Gorazd Planin[ess with caron]i[c-hacek]

University of Ljubljana and The House of Experiments, Ljubljana, Slovenia

This paper describes the construction and use of a color light mixer that uses different color LEDs. The idea was partly inspired by two papers.1,2 The first one describes how a standard LED can be converted into a point-light source, and the second one explains how a Ping-Pong ball can be used to mix polarized color light from two lasers.

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