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
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.