Physics The waves that require a material medium for their propagation are called__________________? Options:A. matter wavesB. electromagnetic wavesC. carrier wavesD. mechanical wavesView AnswerD. mechanical waves Continue Reading Previous: A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?Next: Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?