For observation of propagation, reflection and superimposition of transverse waves; consists of a chain of pendulums mounted on knife-edge bearings and turning about a common horizontal axis. Elastic coupling via rubber bands. With brake on each pendulum and common break rail. In conjunction with brake unit (
401 24), all pendulums can be arrested simultaneously in any desired position. Several basic modules can be coupled together to lengthen the wave machine. Includes locating plate for end pendulum, a pair of tie-plates and a pair of module couplings (short).
