Torsional Wave Machine
Purpose
Demonstrates torsional wave propagation along a vertical cable with perpendicular rods. Students observe pulse propagation, reflection with phase reversal at a fixed boundary, and superposition of incident and reflected waves.
Figure 1:
Upper portion of the torsional wave machine mounted to the catwalk bracket, showing the horizontal rods with end-balls attached along the vertical wire.
Figure 2:
Full-length view of the torsional wave machine deployed in the lecture hall, hanging from the catwalk down to stage level.
Figure 3:
Left: rods at rest. Right: a torsional pulse propagating along the wire, with rods at varying angular positions showing the wave pattern.