The angle between wave velocity and particle velocity in a travelling wave (Longitudinal or Transverse wave ) may be (in radians)
A
0
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B
π4
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C
π2
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D
π
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Solution
The correct option is Dπ For longitudinal travelling wave, angle between wave velocity and particle velocity is either zero or π.
For transverse travelling wave, angle between wave velocity and particle velocity is π2.
Thus, option (a), (c), (d) are correct.