What is the distance between a compression and its nearest rarefaction in a longitudinal wave?

Explanation

To find the distance between a compression and its nearest rarefaction in a longitudinal wave, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of a Longitudinal Wave**:
- In a longitudinal wave, the medium's particles oscillate parallel to the direction of the wave's propagation. This creates regions of compression (where particles are close together) and rarefaction (where particles are spread apart).

2. **Define Wavelength**:
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