WAVE MOTION: PHYSICS SHORT ANSWER QUESTIONS What is Wave Motion ? A wave is a disturbance in a medium and the wave motion explains how a wave moves in any medium. Air isn't a wave. The particles of air move in random directions. However sound can act as a medium for the propagation of other waves. For example, a sound is basically a pressure wave that moves in air through compressions (regions of high density in the air molecules) and rarefactions. Following are some of the chosen V ery Important Physics Short Answer Questions of the Wave Motion module: 1. How are stationary waves formed? Ans: Waves of the same wavelength and amplitude traveling with the same speed through a medium in opposite direction and superimpose upon each other, they give rise to a wave which is called stationary. In stationary waves, there is a certain point where the amplitude of vibration is always zero. point is known as nodes. Midway between these nodes, there are other points where the amplitude o...