REFERENCES

REFERENCES SECTION E

E1-01: CAVENDISH EXPERIMENT - MODEL
Instructions Sheet, Measurement: Determining the Gravitational Constant, Klinger Educational Products, College Pt., NY, (9/7/94).
David Darling, Gravity's Arc, John Wiley & Sons Inc., Hoboken, pp 136-139 (2006).

E1-21: GRAVITATIONAL LENS OPTICAL MODEL
Sidney Liebes, Jr., Gravitational Lens Simulator, AJP 37, 103-104 (1969).
Sidney Liebes, Jr., Brightness - On the Ray Invariance of B/n², AJP 37, 933-934 (1969).
Sidney Liebes, Jr., Gravitational Lenses, The Physical Review, Vol. 133, B835-B844 (1964).
Vincent Icke, Construction of a gravitational lens, AJP 48, 883-886 (1980).
J. Higbie, Gravitational lens, AJP 49, 652-655 (1981).
Jack Higbie, Galactic lens, AJP 51, 860-861 (1983).
Maria Falbo-Kenkel and Joe Lohre, Simple Gravitational Lens Demonstrations, TPT 34, 555-557 (1996).
C. W. Misner, K. S. Thorne, and J. A. Wheeler, Gravitation, Freeman, San Francisco, pp 672-678, 795-796, 887 (1973).
Frederick H. Chaffee, Jr., The Discovery of a Gravitational Lens, Scientific American 70-78 (November 1980).
Edwin L. Turner, Gravitational Lenses, Scientific American 54-60 (July 1988).
Rudolph E. Schild, Gravity Is My Telescope, Sky & Telescope, 375-378 (April 1991).

E2-02: MEASUREMENT OF RADIUS OF EARTH
Lecture Demonstration Information Sheet.
Zachary H. Levine, How to Measure the Radius of the Earth on Your Beach Vacation, TPT 31, 440-441 (1993).

E2-03: CRATER FORMATION MODEL
S. Kasas, G. Dumas, and G Dietler, Impact cratering study performed in the laboratory without a fast recording camera, AJP 68, 771-773 (2000).
Kim Krieger, Craters in a Sandbox, Physical Review Focus (12 September 2003).
Amanda M. Walsh, Kristi E. Holloway, Piotr Habdas, and John R. de Bruyn, Morphology and Scaling of Impact Craters in Granular Media, Physical Review Letters 91, 10 (5 September 2003)
J. S. Uehara, M. A. Ambroso, R. P. Ojha, and D. J. Durian, Low-Speed Impact Craters in Loose Granular Media, PRL 90, 19 (16 May 2003).
K. A. Newhall and D. J. Durian, Projectile-shape dependence of impact craters in loose granular media, Physical Review E, 68 (2003)

E2-12: FUSION MODEL
E. Kashy and D. A. Johnson, A model to illustrate forces in nuclear fusion, AJP 62, 804-806 (1994).
Lawrence Ruby, Letter: Fusion Simulator, AJP 63, 107 (1995).

E2-21: PHASES OF THE MOON
Laurence A. Marschall, Bringing the Moon into the Classroom, TPT 34, 360-361 (1996).
Jack Higbie, Angle of the crescent moon, TPT 38, 371, 455 (2000).

E2-23: UMBRA AND PENUMBRA - EXTENDED SOURCE
William Toews, Shadow Patterns from Extended Light Sources, TPT 29, 280-282 (1991).

E2-33: RETROGADE MOTION
Lecture Demonstration Information Sheet.
Stephen M. Adler, Retrograde Motion Demonstrator, Whitin Observatory, Wellesley College, August 1972.
Matthew J. Moelter and Bernard A. Bates, "Hands-on" Epicycles and Retrograde Motion, TPT 35, 554-555 (1997).
Herman Erlichson, The retrograde motion of Mars, TPT 37, 342 (1999).

E2-37: PLATONIC SOLIDS AND KEPLER
Michael Kowne & H. Mathur, On Feynman's analysis of the geometry of Keplerian orbits, AJP 71, 397-401 (2003).

E2-47: TWINKLING STAR
Jay S. Huebner and Terry L. Smith, Why Magnification Works, TPT 32, 102-103 (1994).
Jay S. Huebner and Terry L. Smith, Letter: More on Twinkling, TPT 32, 263 (1994).

E2-51: GRAVITATIONAL COLLAPSE - MODEL
Geoffrey T. Fox, Minimum Mass of a Neutron Star from the Semi-Empirical Mass Formula, AJP 41, 130-131 (1973).
Ron Singleton, Dallas Trinkle, and Terrence Toepker, Amazing Magnetic Moments, TPT 35, 122-125 (1997).
William Lonc, Novel Third-Law Demonstration, TPT 33, 84 (1995).

E2-63: EXPANDING UNIVERSE
David Chandler, An Expanding Universe in the Classroom, TPT 29(2), 103-106, (1991).
Richard H. Price and Elizabeth Grover, Cosmological expansion in the classroom, AJP 69, 125-128 (2001).