Wave Motion Interference

A 16mm film now incorporated into my article because it’s not only relevant to water, but sound and light waves as well. It is from my own collection that clearly demonstrates how 2 sources of vibration interact. Anybody who uses more that 1 speaker to listen to audio should see this, especially engineers. It shows an ideal world, free of reflections (echoes or reverberation) but is educational never the less. Yet, this form of interference is largel