When a guitarist plucks a string, vibrations travel along the string and finally produce sound that reaches the listener’s ear through the surrounding air.
(i) What type of mechanical wave travels along the stretched guitar string?
(ii) What type of mechanical wave travels through the air to the listener?
(iii) Describe in two or three sentences the difference in the motion of particles in the medium for the two waves mentioned above.
(iv) State with reason which, if any, of these waves can be polarised.