What is the angle between the particle velocity and wave velocity in longitudinal waves and in transverse ?

Explanation

To determine the angle between the particle velocity and wave velocity in longitudinal and transverse waves, we can analyze each type of wave separately.

### Step-by-Step Solution:

**1. Understanding Longitudinal Waves:**
- In longitudinal waves, particles of the medium oscillate back and forth in the same direction as the wave propagates.
- The particle velocity (the direction in which a particle moves) is parallel to the wave velocity (the direction in which the wave travels).

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