Sound is the form of energy, which is produced by vibration of molecules of a body. Sound travels in the form of a wave. Mechanical waves can be propagated only in material medium whereas electromagnetic waves do not require any material medium for propagation. This note provides us the information about sound and its propagation as wave.
One crest and one trough constitute one complete wave in a transverse wave. Longitudinal wave travels in the form of compression and rarefaction. This note provide us the basic idea about wave and its types.