3B20.70 - Crova's Disc
Place the assembly on the overhead projector and focus the slot in the assembly onto the wall. Rotate the disc and the image of the lines as viewed through the slot should take the appearance of either standing or longitudinal waves.
- Randall D. Peters, "Traveling Wave Pedagogy Using an Oscilloscope", TPT, Vol. 28, # 5, p. 337, May 1990.
- S. D. Cloud, "Oscilloscope Traveling Wave Experiment", TPT, Vol. 23, # 3, Mar. 1985, p. 157 - 158.
- R. D. Edge, "An Op Art Wave Demonstration", TPT, Vol. 8, # 9, Dec. 1970, p. 521.
- A. D. Bulman, "Sound-Wave Representation--Crova's and Cheshire's Disks", Model-Making for Physics, p. 66.
- 5.04: R.D. Edge, "Longitudinal Waves - Crova's Disc", American Association of Physics Teachers.
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