Vibration forms Waves


When we speak, sound waves travel in the air. When we throw a stone into a pond, water waves travel on the water surface. The sound waves and the water waves are called progressive waves. The progressive waves spread out.

The waves produced in hollow tubes like flutes and in string instruments like violins are called stationary waves. The stationary waves do not spread out. These waves remain in the region in which they are formed.

Vibration of strings forms stationary waves. Vibration of air column forms progressive waves.

Vibration of Strings, Resonance and Vibration of Air Columns