What is the general name of the waves consisting of :

(a) compressions and rarefactions?

(b) crests and troughs?

A stone is dropped on the surface of water in a pond. Name the type of waves produced.

Name the type of wave produced when a tuning fork is struck in air.

State the general name of the waves on which the particles of the medium vibrate:

(i) in the same direction as wave.

(ii) at right angles to the direction of wave.

What type of waves are illustrated by the movement of a rope whose one end is fixed to a pole and the other end is moved up and down?