Given below are some examples of wave motion. State in each case, if the wave motion is transverse, longitudinal or a combination of both?
(i) Motion of a kink in a long coil spring produced by displacing one end of spring side ways.
(ii) Waves produed in a cylinder containing a liquid by moving its piston back and forth.
(iii) Waves produed by a motor boat sailing in water.
(iv) Light waves travelling from sun to earth.
(v) ultrasonic waves in air produced by a vibrating quartz crystal.

Explanation

(a) Transverse and longitudinal
(b) Longitudinal
(c) Transverse and longitudinal
(d) Longitudinal