The Wave Motion Apparatus is a laboratory instrument used to study wave properties, such as reflection, refraction, and interference. It consists of a long, flexible spring or wire that is attached to a motor at one end and a pulley at the other. The motor generates waves in the spring or wire, which can be observed and studied using various instruments such as a strobe light, a ruler, or a motion sensor.

The Wave Motion Apparatus can be used to demonstrate fundamental wave properties, including wavelength, amplitude, frequency, and wave speed. It is commonly used in physics education to help students visualize and understand wave phenomena, such as standing waves and interference patterns. Additionally, the Wave Motion Apparatus can be used in research settings to study the behavior of different types of waves and wave propagation in various media.