This month I bring you two excerpts from Robert Ehrlich's book Turning the World Inside Out and 174 Other Simple Physics Demonstrations (see "Light Touch," January 1998). Ehrlich is professor of physics at George Mason University in Fairfax,
Va. The demonstrations described
produce nice results, yet are very simple and inexpensive to set up. A small pen light with a Krypton bulb or a small decorative bulb serves as an excellent light source for them. Enjoy!
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Publish Date: 01 March 1998
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