To demonstrate standing waves and progressive waves.
- Overhead projector
- Crova's Discs
Crova's Disc Diagram
Each disc consists of a clear plastic, having non concentric circles ruled upon its surface. The discs are mounted in an aluminium case with a viewing slot, so that the disc may be rotated about its axis in the case.
Both standing and progressive waves may be displayed by placing the appropriate disc on the overhead projector.