Question

The angle between waver velocity and particle velocity in a travelling wave may be

(a) zero

(b) pi/2

(c) pi

(d) All the these

Answer 1

Correct option (d) All the these

Explanation :

In transverse wave

they are perpendicular i.e., pi/2. In longitudinal wave

they are either at 0 or pi so, 0, pi/2, and pi are the possible angles between vp and v.