Demonstrations

Moiré Transparencies

Code Number :	3B50.40
Disclaimer:	Reprinted by permission of Dick Berg, University of Maryland, for use on this website. The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources. Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA. The University of Iowa Disclaimers: University of Iowa Disclaimer All Rights Reserved..
Condition :	Good
Principle :	Wave Phenomenon
Area of Study :	Acoustics
Equipment :	Interference Models for Overhead Projector, Moiré Patterns.
Procedure :	Tape one sheet of the interference models to the overhead projector. Moving another sheet over this one will produce a visible interference front. The other Moiré patterns with the accompanied pictures, will give a variety of different effects. These effects will include 3-D and simulated motion.

References

Seth Hopper, John Howell, "An Exact Algebraic Evaluation of Path-Length Difference for Two-Source Interference", TPT, Vol. 44, # 8, Nov. 2006, p. 516.

Richard A. Lohsen, "Paper Waves", TPT, Vol. 44, # 7, Oct. 2006, p. 475.

Thomas Mills, "Beats with Microsoft Word", TPT, Vol. 44, # 5, May 2006, p. 262.

Thomas B. Greenslade Jr., "Photocopied Beats," TPT, Vol. 43, # 8, p. 514, (Nov. 2005).

David Chandler, "Simulate Interference...While Supplies Last," TPT, Vol. 39, # 6, p. 362- 363, (Sept. 2001).

Jim Krider, Tim Cook, Wayne Easterling, and Iwonna Rzanek, "Hear and See Sound Interference," TPT, Vol. 39, # 4, p. 220, (April 2001).

Bruce Bernero, "The Moiré Effect in Physics Teaching," TPT, Vol. 27, # 7, p. 602, (October 1989).

H. Richard Crane, "Three-Dimensional Moiré Patterns," TPT, Vol. 25, # 2, p. 102, (February 1987).

Y. P. Hwu, "Two Good Demonstrations", TPT, Vol. 17, # 4, Apr. 1979, p. 258.

Robert Prigo, Richard Wormsbecher, "Standing Wave Analogy using Pocket Combs", TPT, Vol. 15, # 3, Mar. 1977, p. 187.

Ralph Baierlein and Vacek Miglus. "Illustrating Double-Slit Interference: Yet Another Way," AJP, P. 857, Vol. 59, No. 9, (September 1991).

W. N. Mathews Jr. "Superposition and Energy Conservation for Small Amplitude Mechanical Waves." AJP, p. 233, Vol. 54, No. 3, (March 1986).

O- 420: "Singing Rod, Moiré & Speakers," DICK and RAE Physics Demo Notebook.

W- 320: "Corrugated Roofing & Sew. Tape," DICK and RAE Physics Demo Notebook.

W- 325: "Moire Pattern Transparencies," DICK and RAE Physics Demo Notebook.

Jearl Walker, "Moiré' Effects, the Kaleidoscope and Other Victorian Diversions," The Amateur Scientist, (December, 1978).

C.L. Stong, "Moiré Patterns Draw Contours, and a Meter Determines Current in Electrostatic Circuits," The Amateur Scientist, (October, 1973).

C.L. Stong, "Moiré Patterns Provide Both Recreation and Some Analogues for Solving Problems," The Amateur Scientist, (November, 1964).

C.L. Stong, "How to Locate a Thunderstorm and Track It By Detecting the Radio Waves It Generates: Moiré Patterns," The Amateur Scientist, (May, 1963).

5.142: Jearl Walker, "Moiré Patterns," The Flying Circus of Physics with Answers.

Robert Ehrlich, "Moiré Patterns," Turning the World Inside Out, p. 191-192.

Robert Ehrlich, "Superposition of Circle Transparencies," Turning the World Inside Out, p. 186-191.

Ron Hipschman, "Moiré Patterns," Exploratorium Cookbook II, p. 133.1 - 133.4.

C. Harvey Palmer, "Experiment A20: Demonstration of the Use of Moire Fringes in the Detection of Ultra Small Mirror Rotations," Optics - Experiments and Demonstrations, John Hopkins Press, 1962.

Mail Questions and Comments to: Dale Stille